Perpetual futures, funding rates and liquidations, explained
How perps work without an expiry, how funding is computed, exactly where a 10x long is liquidated, what auto-deleveraging did on October 10, 2025, and where perps trade on-chain and in the US as of October 2026.
Key takeaways
- A perpetual futures contract, or perp, tracks a crypto asset with leverage and no expiry. Decentralized perp venues alone cleared about $616 billion in the 30 days to October 6, 2026, with Hyperliquid taking roughly a third of that (DefiLlama).
- The funding rate is a periodic payment between longs and shorts that anchors the perp to spot. Annualized bitcoin funding climbed from about 3 percent to about 10 percent in the first two days of October 2026 as open interest rose 27,000 BTC, a textbook sign of leverage building (CoinDesk, Coinglass).
- Liquidation is the forced close of a position whose margin can no longer cover losses. On October 10, 2025 roughly $19 billion of positions were liquidated in 24 hours, the largest dollar figure on record, after a US tariff post hit a crowded long market (Galaxy Research, Coinglass).
- When liquidations cannot be filled and the insurance fund is exhausted, exchanges auto-deleverage (ADL): profitable traders on the other side are closed at the bankrupt position’s price. ADL fired across venues on October 10, 2025 and Binance paid about $283 million to affected users (CoinDesk, February 2026).
- The US perimeter is opening. CME markets its crypto futures and options as 24/7, Coinbase launched perpetual-style index futures on a CFTC exchange in June 2026 and won clearinghouse approval in September 2026, and on October 5, 2026 the CFTC issued a no-action letter allowing designated contract markets to convert perpetual-style contracts into true perpetuals.
Who this is for: Institutional allocators, treasurers, founders and serious retail traders who want to read funding, open interest and liquidation data as a map of market fragility, compute an exact liquidation price, understand what auto-deleveraging can do to a winning position, and know which US-regulated routes to perpetual exposure exist as of October 2026.
Perpetual futures are the instrument that most crypto trading volume actually runs through. Coinbase, pitching its own US derivatives build-out in May 2026, put crypto derivatives at roughly 80 percent of global crypto trading volume, and Payward, Kraken’s parent, estimated global perpetual futures volume at about $85 trillion for 2025 with less than $1 trillion of it accessible to US traders (Payward, September 2026). The funding and liquidation data these contracts generate is read by every serious trader as a map of where the market is leveraged and where it is fragile.
The contract was invented by BitMEX in 2016 to offer futures-like leverage without expiring contracts, and its core design has barely changed since. What has changed is who trades it and where: on-chain order books led by Hyperliquid settle hundreds of billions of dollars a month, perps on equities, indices and foreign exchange have appeared on crypto rails, and US regulators who spent a decade keeping the product offshore are writing rules to bring it inside the perimeter. This guide explains the mechanics, the October 10, 2025 cascade and what auto-deleveraging did that night, the on-chain and US venues, and how to read the data, with a worked example that computes the exact liquidation price of a 10x long under real October 2026 funding and then walks through an ADL event from the winning side.
Perpetual futures by the numbers
How the contract works
A conventional future settles on a date. A perp never settles; it can be held indefinitely. A trader posts margin, chooses leverage, and takes a long or short position whose profit and loss is marked continuously. Two prices matter. The mark price, used to value positions and trigger liquidations, is a smoothed figure blending the venue’s order book with an external index so that a single bad print cannot liquidate a book. The index or oracle price, built from spot prices on several exchanges, is the anchor the perp is meant to track.
What stops the perp drifting away from spot, without an expiry to force convergence, is the funding rate. At fixed intervals one side pays the other a fee proportional to the gap between the perp price and the index: longs pay shorts when the perp trades above spot, shorts pay longs when it trades below. The payment goes between traders, not to the exchange, which earns its money on trading fees and on the fee it keeps when it liquidates a position.
Margin modes
Isolated margin gives each position its own collateral, so a liquidation in one position cannot reach the rest of the account. Cross margin backs every position from one pool, which is capital efficient but means a single blow-up can empty the account. Portfolio margin, for larger accounts on centralized venues, nets risk across spot, options and perps. The margin mode determines both how a liquidation propagates and, as the next section shows, where the liquidation price sits.
Collateral
Most perps are margined in a dollar stablecoin (USDT offshore, USDC on Hyperliquid and the US venues). Coin-margined or inverse contracts, BitMEX’s original design, use the underlying asset as collateral. Several centralized venues also accept yield-bearing or wrapped tokens as collateral at a haircut, and how that collateral is priced matters: on October 10, 2025 the exchange-quoted prices of Ethena’s USDe, wrapped beacon ETH (wBETH) and Binance staked SOL (BNSOL) collapsed on Binance’s own markets, so the collateral behind otherwise healthy positions was marked down by 80 to 90 percent within minutes and those positions were liquidated (Galaxy Research, October 15, 2025). See What is a stablecoin? for how synthetic dollars like USDe hold their peg.
Funding rates: how the number is built
Funding on the big centralized venues (Binance, Bybit, OKX) is paid every eight hours. The rate has two parts: a fixed interest-rate component, conventionally 0.01 percent per eight-hour interval, representing the cost of holding dollars against the asset, and a premium component measured as the gap between the perp’s impact bid and ask prices and the index, averaged over the interval. The premium is clamped so that small gaps do not move the rate, and the overall rate is capped relative to the contract’s maintenance margin.
Hyperliquid publishes its formula in full and it is a useful template. The interest rate is 0.01 percent per eight hours, about 11.6 percent annualized paid to shorts. The premium, sampled every five seconds and averaged over the hour, is the impact price difference divided by the oracle price. The funding rate is the average premium plus a clamp of the interest rate minus the premium, bounded at plus or minus 0.0005. Funding is paid hourly at one eighth of the eight-hour rate, capped at 4 percent per hour, and the payment is position size times oracle price times the rate (Hyperliquid documentation, accessed October 2026).
Reading funding
Funding is a barometer of positioning. Persistently high positive funding means the market is crowded long and paying for the privilege, a condition that has often preceded sharp corrections; negative funding after a sell-off means shorts are paying to stay short, the setup for a squeeze upward. On October 2, 2026, with bitcoin crossing $86,500, Coinglass data showed annualized funding rising from roughly 3 percent to roughly 10 percent while bitcoin open interest rose from 626,000 BTC to 653,000 BTC in two days, a $2.3 billion increase; rising open interest, rising price and rising funding together are the signature of new leveraged longs rather than spot buying (CoinDesk, October 2, 2026).
Annualized funding has ranged from a few percent to well over 100 percent at speculative peaks. That spread is the raw material of the basis trade: buy spot bitcoin or a spot ETF, sell the perp or the CME future, collect funding while hedged against price. The basis trade guide covers sizing, the roll and the risks, and How spot bitcoin ETFs work explains why ETF inflows and futures shorts often rise together.
| Venue | Funding interval | Interest baseline | Rate cap | Pricing reference |
|---|---|---|---|---|
| Binance, Bybit, OKX | Every 8 hours | 0.01% per 8h | Set relative to maintenance margin | Multi-exchange spot index |
| Hyperliquid | Every hour (one eighth of the 8h rate) | 0.01% per 8h (11.6% APR) | 4% per hour | Validator oracle; mark price uses median of three inputs |
| CME bitcoin futures | No funding; monthly expiry, basis converges at settlement | n/a | n/a | CME CF Bitcoin Reference Rate |
| Coinbase Derivatives perpetual-style index futures (June 2026) | Funding mechanism designed to track the index, 24/7 | Not disclosed | Not disclosed | Underlying index, cash settled |
Sources: Hyperliquid documentation; Coinbase, May 21, 2026; CME Group product pages, accessed October 2026; venue futures documentation.
Margin, leverage and the liquidation engine
Leverage on perps commonly runs to 20, 50 or 100 times on the offshore venues; Hyperliquid caps maximum leverage between 3x and 40x depending on the asset. At 20x, a 5 percent move against the position wipes out the margin. Exchanges do not wait for that. Each position carries a maintenance margin requirement, the minimum equity the venue will tolerate, and a liquidation price at which equity falls to that level. Hyperliquid sets maintenance margin at half the initial margin at maximum leverage, which works out to between 1.25 percent of notional for 40x assets and 16.7 percent for 3x assets (Hyperliquid documentation).
What happens at the liquidation price
- The engine takes the position. When equity drops below maintenance margin, the exchange’s liquidation engine assumes control and sends a market order to close it. On Hyperliquid, positions above 100,000 USDC are liquidated in 20 percent slices with a 30-second cooldown before the remainder is sent; most centralized venues also liquidate in stages.
- The fee and remainder. Centralized venues charge a liquidation fee out of the remaining margin, and any surplus after the close goes to the insurance fund. Hyperliquid states there is no clearance fee on liquidations; the trader keeps whatever margin survives the close.
- The backstop. If the order book cannot absorb the close and equity falls further, to two thirds of maintenance margin on Hyperliquid, the position is handed to a backstop liquidator. On Hyperliquid this is the liquidator vault, a component of the HLP vault that is visible on-chain. On centralized venues the insurance fund takes the position or covers the shortfall.
- Auto-deleveraging. If the insurance fund is exhausted, or on some venues if its drawdown over the past eight hours breaches a trigger line, the exchange closes profitable positions on the other side at the bankrupt position’s price. This is the step most traders only learn about when it happens to them, and it is covered in its own section below.
Why cascades happen
On a large move, thousands of positions hit their liquidation prices at once, the forced market orders push the price further, and the next tier liquidates. Order books thin precisely when the engine needs them most, because market makers widen or pull quotes, so each forced sale travels further. Galaxy Research put it in a phrase worth remembering after October 2025: crypto liquidates on prints, not courtesy calls. There is no margin call and no overnight grace period.
Auto-deleveraging and insurance funds
An insurance fund is the exchange’s buffer against the gap between a position’s liquidation price (where the engine starts closing) and its bankruptcy price (where the margin is fully gone). When the engine closes a position at a price better than bankruptcy, the surplus goes into the fund; when it closes worse than bankruptcy, the fund absorbs the loss. On Hyperliquid the equivalent role is played by the HLP vault, whose balance and positions are public on-chain; on the centralized venues the fund balance is published but its composition is not.
Auto-deleveraging is what happens when the buffer is not enough. Bybit’s rules are representative. ADL triggers either when the eight-hour drawdown of a single contract’s insurance pool reaches a published trigger line, or when the combined balance of linked pools falls to or below zero. The engine then ranks traders on the profitable side by leveraged return: for an isolated position in profit, position PnL percentage multiplied by position margin rate; for cross or portfolio margin, PnL percentage multiplied by the account maintenance margin rate. The highest-ranked traders, meaning those with the largest profits and the highest effective leverage, are deleveraged first. Their positions are closed at the bankruptcy price of the liquidated counterparty, not at market, and any difference between that price and market goes to the insurance pool. Bybit displays each trader’s rank as a five-light percentile indicator (Bybit help center, accessed October 2026). Binance and OKX use the same logic with their own thresholds.
For a winning trader the consequence is twofold: the position is removed at a worse price than the market shows, and the trader is flat at the moment the trade is working best. Because ADL fires during the fastest part of a move it is pro-cyclical, removing the very shorts whose covering would otherwise slow a crash. Galaxy’s post-mortem described ADL engaging on multiple venues simultaneously on October 10, 2025 as order-book depth evaporated, amplifying the cascade (Galaxy Research, October 15, 2025).
Case study: the October 10, 2025 cascade
At 20:50 UTC on Friday, October 10, 2025, a post on Truth Social threatened 100 percent tariffs on China. US equities had already closed lower (Nasdaq down 3.6 percent, S&P 500 down 2.7 percent), and crypto was the only large market still open. Bitcoin, which had traded near $124,800 at its early-October peak, fell as much as 12.5 percent, its largest drop in 14 months, trading briefly below $110,000 and bottoming around $106,000 to $107,000; ether fell about 13 percent and the CoinDesk 20 index was down 15 percent at one point (Galaxy Research, October 15, 2025; CoinDesk, October 11, 2025 and February 1, 2026).
The derivatives data was the story. Coinglass recorded roughly $19 billion of liquidations in 24 hours, the largest dollar total on record, and said the true figure was likely higher because Binance does not report every liquidation order. Galaxy put the figure at 0.45 percent of a roughly $4.2 trillion crypto market cap, comparable in relative terms to the April 2021 cascade. About three quarters of the liquidations happened on the major perp venues, with Hyperliquid and Bybit seeing the largest volumes. On Hyperliquid alone, $1.23 billion of trader capital was erased, more than 1,000 wallets were fully liquidated, 6,300 wallets ended the day in the red and 205 lost more than $1 million each; the top 100 winning wallets made $1.69 billion, with one address earning more than $700 million from shorts (CoinDesk, October 11, 2025).
The collateral depeg on Binance
Between 21:20 and 21:51 UTC, USDe on Binance’s order books fell from $1 to about $0.65, wBETH dropped 80 percent in under two minutes to about $430, and BNSOL followed within seven minutes to about $34.90. Because Binance marked collateral at its own exchange price rather than at redemption value, positions collateralized with these tokens were liquidated even where the underlying ETH or SOL had fallen far less. Binance said it had been transitioning collateral pricing toward redemption-based references when the crash hit, later paid about $283 million to affected users and launched a $100 million loan program for market makers, while denying that an internal system failure caused the event (Galaxy Research, October 15, 2025; CoinDesk, February 1, 2026).
Aftermath
Four months later CoinDesk reported that order books had still not been fully rebuilt, with bitcoin near $80,000 on February 1, 2026, and a former CFTC official argued the day warranted a regulatory post-mortem of the kind equities received after the May 2010 flash crash; none has been published. Bitcoin went on to gain 42 percent in Q3 2026 and ether 70 percent, yet CoinGecko data in early October 2026 showed ether’s depth within 0.15 percent of mid at only $13 million to $14 million, 35 to 45 percent of bitcoin’s, down from at least 60 percent a year earlier (CoinDesk, October 5, 2026). Thin books under rising open interest is the configuration that produced October 10.
Where perps trade: offshore, on-chain and in the US
Offshore centralized exchanges
Binance, Bybit, OKX and Bitget account for most global perp volume and are generally not available to US persons. They offer the deepest books in bitcoin and ether, the widest range of altcoin pairs, and increasingly non-crypto underlyings: Binance listed a 24/7 USD/BRL perpetual with 100x leverage in September 2026 (Crypto Coin Show, September 20, 2026).
On-chain order books
Decentralized perp exchanges are now a market in their own right. DefiLlama counted $616 billion of perp DEX volume in the 30 days to October 6, 2026, $25.3 billion in the latest 24 hours and $14.8 billion of open interest. Hyperliquid, an order book on its own layer 1 settling in USDC, took $202.6 billion of the 30-day figure; its cumulative perp volume has passed $5.4 trillion and it earned $87.5 million in fees over the trailing 30 days (DefiLlama, October 6, 2026). Open positions on Hyperliquid reached 435,564 on October 6, 2026, up 115 percent since January, with about 320,600 active traders, even as daily volume fell about 65 percent from an August peak of $12 billion to $16 billion (Crypto Coin Show, October 6, 2026).
On-chain venues differ in ways that matter for risk. Positions, funding, the insurance vault and the liquidation engine’s actions are visible in the ledger, which is why Hyperliquid’s October 10 losses could be tallied wallet by wallet within hours. Hyperliquid’s HIP-3 framework, live since October 2025, lets third parties who stake 500,000 HYPE deploy their own perp markets, including equities, and that is where the newest failure mode appeared. On July 28, 2026 a single SK Hynix share printed 29.96 percent below the prior close in Seoul pre-market trading, the oracle passed the print through, the mark price of the xyz:SKHYNIX perp fell 18.7 percent in an instant and roughly 960 long accounts were liquidated for $57 million to $80 million before the stock recovered two minutes later; 406 positions went to the backstop liquidator (Galaxy Research, July 31, 2026). The lesson is an old one from traditional markets: last trade, index price and fair value for risk purposes must be kept separate.
| Perp DEX | 30-day volume | Design | Settlement asset |
|---|---|---|---|
| Hyperliquid | $202.6bn | Own L1, central limit order book, HLP backstop vault, HIP-3 builder markets | USDC |
| Variational | $65.8bn | Order book, request-for-quote style liquidity | Stablecoin |
| Aster | $60.3bn | Multi-chain order book and pooled liquidity | Stablecoin |
| Lighter | $55.8bn | zk-verified order book on Ethereum L2 | USDC |
| edgeX | $34.4bn | Order book, L2 settlement | Stablecoin |
| GMX | $27.9bn | Pool-based (traders face a liquidity pool) | Pool assets |
Source: DefiLlama perps dashboard, October 6, 2026. Total perp DEX 30-day volume $616.2 billion; open interest $14.8 billion.
Regulated United States venues
For US institutions the historical route has been CME’s bitcoin and ether futures and options, which expire monthly and carry no funding; CME now lists more than 20 crypto futures and options, including XRP and spot-quoted contracts, and markets them as tradable 24/7 (CME Group product pages, accessed October 2026). The perimeter has moved quickly since the CFTC’s April 21, 2025 requests for comment on perpetual contracts and on 24/7 trading. Coinbase Derivatives listed perpetual-style crypto futures in 2025, launched the first perpetual-style equity index futures on a US exchange on June 14, 2026 (AI10, China10, Defense10 and Tech100, cash settled, round-the-clock, with a funding mechanism), filed in September 2026 to list single-stock perps on Apple, Tesla and Nvidia, and on September 28, 2026 won CFTC approval for Coinbase Clearing LLC, a USDC-native clearinghouse with 24/7 settlement (Coinbase, May 21 and September 28, 2026; Crypto Coin Show, September 21, 2026). Since May 29, 2026 Coinbase Financial Markets has also acted as the first CFTC-regulated futures commission merchant routing US institutions to offshore crypto options and perpetual liquidity, starting with Deribit (Coinbase, May 29, 2026).
Kraken’s parent Payward announced on September 16, 2026 a structure for US clients to trade on-chain perpetuals on Hyperliquid’s HIP-3 markets, with Bitnomial as the CFTC-registered exchange and clearinghouse and NinjaTrader Clearing as the futures commission merchant, pending approval (Crypto Coin Show, September 16, 2026). Kalshi has asked the SEC to approve perpetual futures on 58 US stocks and ETFs (Crypto Coin Show, September 22, 2026). And on October 5, 2026 the CFTC issued a no-action letter permitting designated contract markets to convert existing perpetual-style broad-based security index futures into true perpetual futures, alongside proposed Regulation CTX and Regulation CAM for leveraged crypto trading with a 60-day comment period (CFTC, October 5, 2026). See SEC vs CFTC: who regulates crypto? for the split between the two regulators and Crypto prime brokerage explained for how brokers intermediate these venues.
Reading the data
Three numbers do most of the work. Open interest, the total notional of outstanding contracts, shows how much leverage is in the system; rising open interest with a flat price means positions are building for a move, and rising open interest with a rising price and rising funding means longs are being added with borrowed money. Bitcoin futures open interest stood at 653,000 BTC, about $56.2 billion, on October 2, 2026 (Coinglass via CoinDesk). The funding rate shows which way the positions lean. The liquidation map, an estimate of where liquidation prices cluster above and below the current price, shows where a move would accelerate.
Two refinements help. Denominate open interest in coins as well as dollars, because a dollar figure rises with price even when no new positions open. And compare open interest with order-book depth: $56 billion of open interest is far more dangerous above a book with $13 million of depth within 0.15 percent than above one with twice that. Coinglass, Velo, DefiLlama and others publish all three series, and CCS maintains its own liquidation map in the crypto prices section of this site. For on-chain venues the ledger itself is the source: How to read on-chain data explains how to pull positions, vault balances and liquidation events directly from Hyperliquid and its peers.
Liquidation data also tells you what kind of day it was. On January 22, 2026 losses were split almost evenly between longs and shorts as bitcoin swung both ways (CoinDesk, January 22, 2026); in April 2026 a little-known token, RAVE, ranked third behind bitcoin and ether by liquidation volume (CoinDesk, April 14, 2026); and RWA perpetuals reached $18.8 billion of weekly volume in September 2026, displacing altcoin trading on Hyperliquid and Binance (Crypto Coin Show, September 23, 2026). See Tokenized stocks and pre-IPO tokens explained for how equity and pre-IPO perps fit together.
How we got here: a timeline
Worked example: a 10x long, real funding, and an ADL night
Assumptions. Bitcoin trades at $86,500, the level CoinDesk reported on October 2, 2026. A trader opens an isolated-margin long of exactly 1 BTC notional ($86,500) at 10x leverage, posting $8,650 of USDC margin. The venue uses Hyperliquid’s published rules: maximum leverage on BTC is 40x, so maintenance margin is half the initial margin at 40x, which is 1.25 percent of notional. Annualized funding is 10 percent, the figure Coinglass showed that week, and is assumed to stay constant for 30 days. Trading fees are ignored.
Step 1: maintenance margin and margin available. Maintenance margin required at entry is 1.25 percent of $86,500, or $1,081.25. Margin available for losses is $8,650 minus $1,081.25, or $7,568.75.
Step 2: the exact liquidation price. Hyperliquid’s formula is liquidation price equals entry price minus side times margin available divided by position size divided by (1 minus l times side), where l is 1 over the maintenance leverage (80x, so 0.0125) and side is 1 for a long. That gives $86,500 minus $7,568.75 divided by 0.9875, which is $86,500 minus $7,664.56, or $78,835.44. Check it: at that price the position has lost $7,664.56, leaving equity of $985.44, and maintenance margin at that price is 1.25 percent of $78,835.44, also $985.44. The trade is liquidated after an 8.86 percent fall, not the 10 percent that the leverage figure suggests, because the engine acts when equity hits maintenance, not zero.
Step 3: what funding costs. At 10 percent annualized, the long pays 0.00114 percent of notional per hour, or about $0.99 an hour on $86,500. That is $23.70 a day and $711 over 30 days, equal to 8.2 percent of the posted margin. On an eight-hour venue the same annual rate is 0.00913 percent per interval, $7.90 three times a day, the same $23.70.
Step 4: funding moves the liquidation price. Funding is deducted from margin, so after 30 days margin available has fallen to $6,857.75. Rerunning the formula: $86,500 minus $6,857.75 divided by 0.9875 gives $79,555.44. Doing nothing for a month moved the liquidation point $720 closer to the entry. At a 50 percent annualized rate, the kind seen at speculative peaks, the same month would cost $3,555 and lift the liquidation price above $82,400.
| Scenario | Margin available | Liquidation price | Drop from entry |
|---|---|---|---|
| Day 0, 10x isolated long | $7,568.75 | $78,835.44 | 8.86% |
| Day 30, funding 10% annualized | $6,857.75 | $79,555.44 | 8.03% |
| Day 30, funding 50% annualized | $4,013.75 | $82,435.44 | 4.70% |
Step 5: the other side of the book on a cascade night. Now take a second trader who is short 10 BTC from $86,500 at 5x on a centralized venue, posting $173,000 of margin. A macro headline hits and bitcoin gaps 10 percent to $77,850 in forty minutes, through our first trader’s liquidation price and thousands of others. The engine tries to close the longs at market, the book is empty below $79,000, many longs close below their bankruptcy prices and the BTC insurance fund draws down past its eight-hour trigger line. ADL activates. The short is up $86,500 on $173,000 of margin, a 50 percent return at 5x, which ranks in the top percentile by leveraged return. The venue closes it at the bankrupt longs’ bankruptcy price, say $79,200, rather than the $77,850 market: the short realises $73,000 instead of $86,500, a $13,500 haircut, and is flat as the market falls a further 3 percent. The trader did everything right and still lost a fifth of the paper gain to the venue’s solvency mechanism. On Hyperliquid the bad longs route to the HLP vault first; ADL is the last resort there too.
How to evaluate a perp venue or position: a checklist
- Where is the liquidation price, exactly? Compute it from the venue’s published maintenance margin and formula rather than from the leverage number. A 10x long on a 1.25 percent maintenance contract dies at an 8.9 percent fall, not 10 percent.
- How is collateral priced? If yield-bearing or wrapped tokens are accepted as margin, is the price the exchange’s own order book or the redemption value? October 10, 2025 showed the difference can be 80 percent in two minutes.
- How is the mark price built? A good answer blends a multi-source index with the book and smooths it; a single-source oracle, as in the July 2026 SK Hynix episode, means one bad print can liquidate a market.
- What is the insurance fund worth, in what asset, relative to open interest? A fund that is small against open interest, or held in the exchange’s own token, moves the venue closer to ADL on a bad day. On-chain vaults can be checked directly.
- What are the ADL rules and where do I rank? Know the trigger (fund depletion or drawdown line), the ranking formula and the settlement price. If you run high leverage and a large profit you are first in line.
- What has funding cost over the holding period? Annualize it, deduct it from margin and recompute the liquidation price. A month of 10 percent funding on a 10x position consumed 8 percent of margin in the example above.
- Is open interest rising faster than depth? Compare open interest in coins against order-book depth within 0.15 percent and 2 percent of mid. Rising open interest over a thinning book is the October 10 configuration.
- Who regulates the venue and who holds my collateral? A CFTC-registered DCM with an FCM and a clearinghouse (CME, Coinbase Derivatives, Bitnomial) segregates customer funds under US rules; an offshore venue or a smart contract does not, with different trade-offs in transparency.
Risks and open questions
The first risk is structural and unchanged since 2016: perps concentrate leverage in a market with no circuit breakers, no central clearing across venues and no lender of last resort. Every venue runs its own insurance fund and ADL rules, so a cascade on one exchange reprices collateral on all of them within seconds. The October 2025 event was 0.45 percent of market cap; the same relative cascade at a higher market cap would be larger in dollars, and the October 2026 depth data suggests books have not grown with open interest.
The second is oracle and collateral design. The Binance depegs of October 2025 and the SK Hynix liquidations of July 2026 were both cases where the price feeding the risk engine was technically correct but economically wrong for a few minutes. As perps spread to equities, foreign exchange, pre-IPO shares and tokenized real-world assets, each underlying brings a new oracle problem and often a thinner reference market, and who makes users whole after a bad print is settled case by case: Binance paid; Hyperliquid’s HIP-3 deployer did not have to.
The third is regulatory. The CFTC’s October 2026 proposals and no-action letter describe a path for true perpetuals on US exchanges, but with the Clarity Act stalled in the Senate in September 2026 the agency is acting on existing authority that a future commission or a court could narrow, and the SEC’s role in equity perps, where Kalshi has filed, is unresolved. Regulated venues are not automatically cleaner: CCS’s own analysis in September 2026 found patterns consistent with wash trading on Kalshi’s ether perpetual market (Crypto Coin Show, September 21, 2026).
What to watch next
- CFTC comment deadlines on Regulation CTX and CAM, roughly early December 2026. The 60-day window from Federal Register publication will show whether offshore venues, US exchanges and consumer groups accept a DCM-style framework for leveraged crypto trading, and whether true crypto perps are addressed explicitly.
- First DCM conversion to true perpetuals under the October 5, 2026 no-action letter. Coinbase Derivatives’ perpetual-style equity index futures are the obvious candidates; a conversion would make funding-rate contracts with no expiry a reality on a US exchange for the first time.
- Payward and Bitnomial approval for HIP-3 perps for US clients, late 2026 or 2027. A regulated FCM holding accounts for on-chain perps would set the model for every other US broker.
- Coinbase single-stock perps on Apple, Tesla and Nvidia. Filed in September 2026 and expected after Coinbase Clearing LLC’s approval; their listing would test how equity market hours, halts and corporate actions interact with a 24/7 funding contract.
- The next open-interest high against current depth. Bitcoin open interest at 653,000 BTC in early October 2026 with ether depth down a third year over year is the configuration to monitor; a new high in open interest without a recovery in depth raises the odds of another October 10.
Glossary
- Perpetual futures (perp)
- A leveraged derivative that tracks an asset’s price with no expiry date, kept close to spot by periodic funding payments between longs and shorts.
- Funding rate
- The periodic payment, usually every hour or eight hours, from one side of the market to the other, set by the gap between the perp price and the spot index plus a fixed interest component.
- Mark price
- A smoothed price blending the venue’s order book with an external index, used to value positions and trigger liquidations so that a single trade cannot liquidate a book.
- Index or oracle price
- The spot reference price, built from several exchanges, that the perp is designed to track and that funding is measured against.
- Initial margin
- The collateral required to open a position; at 10x leverage it is 10 percent of notional.
- Maintenance margin
- The minimum equity a venue tolerates before liquidating, typically a fraction of initial margin; 1.25 percent of notional on Hyperliquid’s 40x assets.
- Liquidation price
- The price at which a position’s equity falls to its maintenance margin and the exchange’s engine begins to close it.
- Bankruptcy price
- The price at which a position’s margin is fully exhausted; losses beyond it fall on the insurance fund or on other traders via ADL.
- Insurance fund
- A pool funded by liquidation surpluses that covers losses when a position is closed worse than its bankruptcy price.
- Auto-deleveraging (ADL)
- The last-resort process that closes profitable traders’ positions at a bankrupt counterparty’s price when the insurance fund cannot cover the shortfall, ranking them by profit and leverage.
- Open interest
- The total notional value, or number of coins, in outstanding contracts; the main gauge of how much leverage is in the system.
- Liquidation cascade
- A chain reaction in which forced closures push price through further clusters of liquidation prices, amplifying the move.
- Basis trade
- Buying spot or a spot ETF and selling a future or perp against it to collect funding or futures premium while hedged against price.
- HIP-3
- Hyperliquid’s framework, live since October 2025, under which third parties staking HYPE deploy their own perp markets, including equities and real-world assets.
Why it matters
Perps set the price. Because the volume and the leverage sit there, spot markets and even ETF flows often follow moves that originate in the derivatives book. An institution with no intention of ever trading a perp still needs to understand funding, open interest and liquidation clustering, because those variables explain why the asset it holds just moved 8 percent in an hour on no news, and why the October 10, 2025 drawdown was still visible in order-book depth four months later.
The product is also migrating. Within eighteen months perps have gone from an offshore crypto instrument to a contract design that US-regulated exchanges are applying to equity indices, single stocks, pre-IPO shares and foreign exchange, with the CFTC writing rules for it and the SEC fielding filings. Funding, maintenance margin, insurance funds and ADL are about to become part of mainstream market structure, and the failure modes crypto has already lived through are the ones those markets will need to design around.
Sources
- CFTC: No-Action Letter for DCMs Regarding Converting Existing Perpetual-Style Broad-Based Security Index Futures into True Perpetual Futures, October 5, 2026
- CFTC: Seeks Public Comment on Regulation Crypto Asset Transactions and Regulation Crypto Asset Markets, October 5, 2026
- CFTC: Chairman Selig remarks at the Fordham Law Blockchain Regulatory Symposium, October 5, 2026
- CFTC: Request for Comment on Perpetual Contracts in Derivatives Markets, April 21, 2025
- CFTC: Request for Comment on 24/7 Trading, April 21, 2025
- Coinbase: Coinbase Receives CFTC Approval for Coinbase Clearing LLC, September 28, 2026
- Coinbase: Coming June 14, Perpetual-Style Equity Index Futures, May 21, 2026
- Coinbase: Coinbase Brings Global Crypto Derivatives to US Market, May 29, 2026
- CME Group: Cryptocurrency futures and options, accessed October 6, 2026
- Hyperliquid documentation: Funding, accessed October 6, 2026
- Hyperliquid documentation: Liquidations, accessed October 6, 2026
- Bybit help center: Auto-Deleveraging (ADL), accessed October 6, 2026
- DefiLlama: Perpetuals volume and open interest dashboard, October 6, 2026
- DefiLlama: Hyperliquid protocol metrics, October 6, 2026
- Galaxy Research: Crypto’s Most Violent Flash Crash Yet, October 15, 2025
- Galaxy Research: How One Share in Seoul Broke Hyperliquid’s Largest Equity Market, July 31, 2026
- CoinDesk: ‘Largest Ever’ Crypto Liquidation Event Wipes Out 6,300 Wallets on Hyperliquid, October 11, 2025
- CoinDesk: Crypto’s $19 billion ’10/10′ nightmare, February 1, 2026
- CoinDesk: Bitcoin open interest jumps $2.3 billion as traders pay more for bullish positions, October 2, 2026
- CoinDesk: Ether’s bitcoin-beating Q3 rally came with a catch. Liquidity thinned., October 5, 2026
- CoinDesk: U.S. CFTC joins SEC in proposing crypto regulations, though spot-market gap lingers, October 5, 2026
- Crypto Coin Show: Payward launches first U.S.-regulated onchain perpetual futures via Hyperliquid, September 16, 2026
- Crypto Coin Show: Hyperliquid perpetual futures open positions surge 115% to 435,564 amid volume collapse, October 6, 2026
- Crypto Coin Show: Coinbase seeks CFTC approval for single-stock perpetual futures on Apple, Tesla and Nvidia, September 21, 2026
Disclosure: This guide is for education only and is not investment, legal or tax advice.
Frequently asked questions
What does a positive funding rate mean?
The perpetual is trading above the spot index and long positions are paying short positions a periodic fee, hourly on Hyperliquid and every eight hours on Binance, Bybit and OKX. Persistently high positive funding indicates a crowded long market and is often read as a warning of a correction. In early October 2026 annualized bitcoin funding rose from about 3 percent to about 10 percent in two days as open interest climbed 27,000 BTC.
What is a liquidation cascade?
When a price move pushes many leveraged positions past their liquidation prices at once, the exchange force-closes them with market orders, the selling pushes the price further, and the next tier of positions liquidates. It is why crypto moves are frequently sharper than the news that triggered them. The largest on record was October 10, 2025, when about $19 billion of positions were liquidated in 24 hours after a US tariff announcement.
Can US institutions trade perpetual futures?
Increasingly, yes. CME bitcoin and ether futures, which expire monthly and trade 24/7, remain the deepest regulated market. Since May 2026 Coinbase Financial Markets, a CFTC-regulated FCM, routes US institutions to offshore crypto perps and options. Coinbase Derivatives lists perpetual-style futures on a US exchange, and on October 5, 2026 the CFTC allowed designated contract markets to convert perpetual-style index futures into true perpetuals. Payward's HIP-3 perps for US clients await approval.
What is the basis trade?
Buying spot bitcoin or a spot ETF and simultaneously selling a futures or perpetual contract, collecting the funding rate or futures premium while hedged against price. It is a major source of institutional demand for spot ETFs and of short interest on CME. Its return is the annualized funding or basis less financing and fees, and it carries the risk that funding turns negative or the short leg is auto-deleveraged on a sharp move.
How is the liquidation price calculated?
It is the price at which equity falls to the maintenance margin, not to zero. On Hyperliquid the formula is entry price minus margin available divided by position size divided by one minus the maintenance margin rate, for a long. A 10x isolated long of 1 BTC at $86,500 with 1.25 percent maintenance margin is liquidated at $78,835, an 8.86 percent fall, and funding paid over time moves that price closer to entry.
What is auto-deleveraging (ADL)?
The last-resort mechanism used when liquidations cannot be filled and the insurance fund is exhausted or breaches a drawdown trigger. The exchange ranks profitable traders on the opposite side by profit and leverage and closes the highest-ranked positions at the bankrupt counterparty's bankruptcy price rather than at market. Winners lose part of their gain and their position. ADL engaged on several venues at once on October 10, 2025.
What is an exchange insurance fund?
A pool, funded by the surplus when positions are liquidated at better than their bankruptcy price, that absorbs the loss when a position is closed at worse than bankruptcy. On centralized venues the balance is published but not independently auditable; on Hyperliquid the HLP vault plays the role and its holdings and liquidation activity are visible on-chain. When the fund is insufficient the venue moves to ADL.
How big are decentralized perp exchanges now?
Large. DefiLlama recorded about $616 billion of perp DEX volume in the 30 days to October 6, 2026 and $14.8 billion of open interest. Hyperliquid accounted for about $203 billion of that volume, followed by Variational, Aster and Lighter at roughly $56 billion to $66 billion each. Hyperliquid's cumulative perp volume has passed $5.4 trillion and it had about 435,000 open positions and 320,000 active traders on October 6, 2026.
This explainer is reviewed and updated as the rules and the market change. Last reviewed October 6, 2026. It is educational content and not financial, legal or tax advice.