Overview Bitcoin just closed its strongest quarter since 2024, and the derivatives market spent that same stretch shedding exposure. CoinDesk, citing CoinGlass data, reported on September 28 that coinOverview Bitcoin just closed its strongest quarter since 2024, and the derivatives market spent that same stretch shedding exposure. CoinDesk, citing CoinGlass data, reported on September 28 that coin
BTC Funding Rate and Open Interest Explained: Leverage Risk Analysis
Overview
Bitcoin just closed its strongest quarter since 2024, and the derivatives market spent that same stretch shedding exposure. CoinDesk, citing CoinGlass data, reported on September 28 that coin-denominated futures open interest had fallen to roughly 652,000 BTC, near its lowest level of the year and well below the 800,000 peak set in early 2026. Perpetual funding rates across major venues had flipped negative at the same time, averaging about minus 0.3% on an annualized basis. A rally running on falling leverage is not something a price chart can explain on its own.
Funding rates, open interest, basis and liquidations form a single interlocking system of readings. They do not describe price direction. They describe who is paying to hold risk, how much risk is outstanding, and where that risk is forced to exit. Reading them together is what separates a rally built on fresh capital from one built on short covering, and a selloff that clears leverage from one that merely moves sentiment.
Key Takeaways
Funding measures urgency, not direction. It is the mechanism that keeps perpetual contracts tethered to spot. A positive rate means longs pay shorts, a negative rate means shorts pay longs, and per MEXC's futures documentation the payment moves directly between traders with no platform cut.
Open interest measures outstanding exposure. It counts contracts that have not yet been closed. Rising open interest means new positions are being opened, falling open interest means positions are being closed, and neither carries a direction until it is paired with price.
The denomination changes the answer. Open interest measured in dollars is inflated or deflated by the price of the asset itself. Measured in coins, that distortion disappears. Glassnode noted that bitcoin was up roughly 35% from its August low while coin-denominated open interest had fallen almost 20% over the same window.
This deleveraging was voluntary. K33 Research data showed combined CME and perpetual open interest falling about 49,000 BTC in the seven days to September 28, the largest weekly drop since October 2025, and it happened without a wave of forced closures.
Less leverage changes the shape of volatility. On October 10, 2025, more than $19 billion of leveraged positions were liquidated in a single day and perpetual open interest fell from $217 billion to $123 billion. That structure was built on crowded longs. The current base is not.
Why Leverage Data Is Back at the Center
A Record Quarter With Shrinking Positions
Bitcoin gained roughly 40% in the third quarter, making it one of the best-performing assets of the period. The conventional pattern would have open interest expanding alongside it. Instead, coin-denominated futures open interest slid to about 652,000 BTC in late September, close to the yearly low, against an early-2026 high of 800,000. Capital left the leverage market while price was still climbing.
Funding rates told the same story from the other side. Perpetual funding across major exchanges averaged roughly minus 0.3% annualized. Every long is matched by a short, but the two sides rarely want the trade with equal conviction, and that asymmetry is exactly what funding prices. A negative rate indicates shorts are the aggressive side and are willing to pay longs to keep bearish exposure open, which is the opposite of what an advancing market usually produces.
The macro backdrop accounts for part of it. CoinDesk reported on October 1 that a cooler-than-expected August PCE print briefly lifted bitcoin to $85,500 before the move faded, with the 10-year Treasury yield holding near 5.28% and the 30-year close to its highest level since 2002. When risk-free yields sit that high, the willingness to pay a carrying cost for directional leverage declines on its own.
Profit-Taking, Not Forced Exits
The character of a position reduction matters more than its size. According to CoinMarketCap Academy's account of K33 Research data, combined CME and perpetual open interest fell about 49,000 BTC in the week to September 28, representing roughly $4.1 billion of closed positions, leaving coin-denominated open interest at its lowest since March. K33 head of research Vetle Lunde noted that every larger drop in open interest had previously come with liquidations, while this one looked like profit realization.
A meaningful share of the decline was mechanical rather than emotional. CME open interest fell 16,075 BTC as the September contract expired, the third-largest single-day decline on record, with traders letting contracts settle instead of rolling them. Reading that as institutions abandoning bitcoin exposure is one of the most common errors in interpreting open interest data.
What Each Metric Actually Measures
Funding Rate, the Cost of the Anchor
Perpetual contracts have no expiry, so they lack the natural convergence that settlement provides. Funding replaces it. When the contract trades above spot the rate turns positive, longs pay shorts, holding long exposure becomes more expensive, and arbitrageurs are drawn in to short the contract against spot until the gap narrows. Below spot, the flow reverses. MEXC's futures terminology guide notes that funding on its perpetual contracts is generally settled every eight hours, with exact settlement times and rate caps shown on each pair's page.
The arithmetic is simple. Per MEXC's futures calculation guide, the funding fee equals the funding rate multiplied by position value, where position value is the fair price multiplied by the number of contracts and the contract size. The important detail is that it is charged on notional value rather than on margin, which means the higher the leverage, the more sharply the same payment eats into account equity.
Open Interest, the Size of the Bet
Open interest counts contracts that remain open. It is not volume. Volume records turnover, open interest records standing exposure. A new long meeting a new short raises it, a closing long meeting a closing short lowers it, and a long handing its position to another long leaves it unchanged.
The unit of measurement drives the conclusion. Measured in dollars, a rising coin price inflates open interest even when contract counts are flat. Measured in bitcoin, that effect is stripped out. The unusual combination of a strong price and weak leverage visible today exists precisely because the coin-denominated view reveals a contraction that the dollar view conceals.
Collateral type matters just as much. CoinDesk, citing Glassnode in late August, reported that crypto-margined open interest had fallen to a record low of roughly 52,000 BTC, around 11% of total market activity, with cash collateral dominating. That distinction is structural: cash collateral does not lose value as bitcoin falls, while coin collateral creates a loop in which falling prices shrink collateral, trigger liquidations and push prices lower still.
Basis, the Spread Between Spot and Futures
Basis is the gap between futures and spot prices, and annualized it represents the yield available from holding spot while selling futures, the cash-and-carry trade. CME Group's cryptocurrency BasisWatch and implied rate tool exists to track that relationship. CME's bitcoin futures contract is cash settled in dollars, represents five bitcoin, and settles to the CME CF Bitcoin Reference Rate.
There is research on where basis normally sits. The Bank for International Settlements working paper on crypto carry found that average annualized carry across exchanges ran near 7% between April 2019 and July 2024, with one-month bitcoin basis averaging about 6.4% on CME and about 8% on OKEx, spiking far higher in stressed periods. The same study found that the launch of spot bitcoin ETFs compressed basis across venues, and on CME most of all.
Basis and funding measure the same underlying thing through different contract structures: the premium the market will pay for long exposure. Rich basis alongside rising funding points to broad-based leverage demand. Basis compressed toward the cost of capital pushes arbitrage capital out, which is itself a reading on how hot the derivatives market has become.
Liquidation, Where Leverage Exits
When margin no longer supports a position, the exchange closes it. That closure puts an order into the book in the same direction as the original move, pushing price further and tripping the next set of positions. Liquidation data is therefore not an after-the-fact tally but the direct explanation for why price accelerates non-linearly at certain levels.
October 10, 2025 remains the textbook case. CNBC reported that more than 1.6 million traders saw a combined $19.37 billion of leveraged positions erased within 24 hours, the largest event CoinGlass has tracked. CoinDesk Research's post-mortem showed perpetual open interest across major exchanges falling 43% in a day, from $217 billion to $123 billion, with Hyperliquid dropping from $14 billion to $6 billion. MEXC has catalogued further historical episodes in its overview of the ten largest crypto liquidations.
Reading the Four Price and Open Interest Combinations
Price Up, Open Interest Up
New money is building long exposure. This is the most straightforward bullish configuration, but funding is what grades its quality. A mildly positive rate suggests leverage demand is expanding in step with price. A rate spiking higher suggests longs are chasing without regard to cost, and the trade is becoming crowded.
The market heading into October 10, 2025 sat at the end stage of exactly that process. Perpetual open interest stood at $217 billion the day the shock landed, with long positioning concentrated, and when the external catalyst arrived roughly $16.7 billion of long positions were erased against about $2.5 billion of shorts. Rising open interest is not the risk. Rising open interest paired with an extreme funding rate is.
Price Up, Open Interest Down
This is a short-covering rally. Rising prices force shorts to close, those closures are themselves buying, and the move extends, but old positions are being retired rather than new ones created, so open interest shrinks.
Late August of this year worked that way. CoinDesk reported coin-denominated futures open interest at a five-month low with short liquidations and position closures driving the move while funding stayed subdued. The signature of this pattern is that the push comes from forced exits rather than fresh allocation, so momentum fades once the available shorts are exhausted. The compensating feature is that it does not stack new liquidation fuel at higher prices. Bitcoin's current 35% advance against a near-20% decline in coin-denominated open interest belongs in this category.
Price Down, Open Interest Up
New shorts are entering and paying for the privilege. This combination usually comes with deeply negative funding and signals a bearish consensus forming, but it also means the short side is getting crowded.
Late February produced the archetype. CoinDesk reported at the time that bitcoin briefly fell to $63,000 while perpetual funding dropped to minus 6% annualized, its second most negative level in three months, and coin-margined open interest rose from 668,000 to 687,000 BTC in 24 hours. Past a certain point of crowding, any contrary headline can trigger a squeeze, which is why extreme negative funding is often treated as a precondition for reversal rather than confirmation of a trend.
Price Down, Open Interest Down
Leverage is being cleared. That can be voluntary stop-outs or forced liquidation, and the liquidation tally is what distinguishes them. Large liquidation totals point to a forced unwind. Modest liquidations alongside a steady decline in open interest look more like an orderly retreat.
October 2025's 43% evaporation of open interest was the first kind. September's 49,000 BTC reduction was the second. Their implications diverge completely: the first destroyed trader capital and market-making capacity in a matter of hours, while the second simply lowered the water line without damaging market structure. This is precisely why the magnitude of an open interest decline, read in isolation, supports no conclusion at all.
Turning Funding Into a Real Carrying Cost
Funding is quoted per settlement period, which makes the number look negligible until it is annualized. At eight-hour settlement there are three payments a day, so a 0.01% rate works out to 0.03% daily and roughly 10.95% a year. On a position running ten times leverage, that is close to a 110% annualized drag relative to the margin posted. Trades that get direction right but hold too long often hand their profit back at exactly this point.
The reverse applies when funding is negative. Holding a long then costs nothing and instead earns payments from the short side. The current average of about minus 0.3% annualized is modest in magnitude, but it changes the carrying economics of long exposure, which is one more reason the market cannot be described as overheated right now. To price this out before opening a position, MEXC's futures calculator includes a funding module that takes direction, fair price, quantity and rate directly.
Trading costs belong in the same calculation. The taker fee on MEXC futures markets is 0.02% with a maker fee of 0%, and strategies that turn over frequently accumulate more on the combined fee and funding line than intuition suggests. Current BTC-focused activity on the platform is listed on the MEXC BTC Carnival page.
The tape never waits. Open the BTC/USDT market on MEXC and put funding and open interest to work in your next decision.
Is Bitcoin Leverage Overheated Right Now
The Case That It Is Not
Coin-denominated open interest has returned to the low end of its yearly range, far from the 800,000 BTC peak set in early 2026. Funding has not climbed with price but turned negative, which rules out a crowded long. Crypto-margined collateral has fallen to roughly 11% of the market, a record low, so the reflexive loop that amplifies selloffs is structurally weaker. And the most recent large contraction in open interest came without forced closures, unlike every comparable episode before it.
Taken together, those four conditions imply that the cascade an external shock could generate at current levels is materially smaller than it would be with open interest near its highs.
What Still Warrants Caution
Glassnode supplied the other half of the picture, noting that combined futures and options open interest sits above its usual range and that short-term holders are realizing profits at a high rate. Lower leverage does not mean selling pressure has disappeared. It means the source of that pressure has shifted from forced liquidation to voluntary distribution.
Macro remains the dominant variable. The 10-year Treasury yield is sitting near 5.28%, the 30-year is at its highest since 2002, and the Federal Reserve raised the target range to 3.75% to 4% in its September 16 decision. When risk-free yields are that generous, an asset with no cash flow needs a stronger narrative to attract leveraged capital, which is the simplest explanation for why a rising price has not pulled open interest up with it.
One more risk is easy to overlook: low open interest itself. Fewer participants means thinner books, and an order of a given size can move price further than it would in a deeper market. Less leverage does not automatically mean less volatility. It changes how volatility propagates.
Scenarios and a Watch List
In a squeeze scenario, funding stays negative, short positioning keeps building, and spot or ETF demand supplies the upward push, with trapped shorts amplifying the move as they close. The signature is a fast advance with no growth in open interest, followed by a sharp loss of momentum once the available shorts are consumed.
In a rebuild scenario, higher prices draw new longs in and both open interest and funding rise together. That expansion is healthy on its own terms, but if funding reaches extreme territory while spot demand fails to keep pace, the structure turns fragile again. That was the script running into October 2025.
In a macro shock scenario, an external event hits during a thin liquidity window and amplifies the move regardless of leverage levels. The difference is depth: with open interest near yearly lows, the cascade has less to feed on, and that is the single most important structural contrast with October 2025.
The variables worth tracking from here include the Federal Reserve's October 27 to 28 meeting, listed on the FOMC calendar; whether 10-year and 30-year Treasury yields retreat; how open interest behaves around the next CME quarterly expiry; and whether coin-denominated open interest and crypto-margined collateral share begin climbing again. Day-to-day readings are available on CoinGlass's BTC futures dashboard and its funding rate page.
Exclusive View from James Mitchell
For James Mitchell, the striking feature of this data set is how cleanly price and leverage have decoupled. Bitcoin is up roughly 35% from its August low while coin-denominated open interest has fallen almost 20%, which means the marginal buyer driving this move is not sitting in perpetual contracts. It is spot and ETF capital, which pays no funding and cannot be liquidated. Structurally, rallies of that composition tend to climb at a shallower angle and to give back less when they correct.
The most likely misreading is treating falling open interest as a bearish signal. Open interest is directionless. It measures the total quantity of outstanding risk, not its orientation. What has to be distinguished is the character of the reduction, and September's 49,000 BTC contraction came without large liquidations, with 16,075 BTC of it attributable to the mechanical effect of CME contract expiry. Read settlement as institutional withdrawal and the conclusion inverts. The second common error is ignoring the denominator: viewed in dollars, open interest almost always appears to grow during a price rally, while the coin-denominated series says the opposite is happening.
What deserves the most attention next is not any single day's funding print but the moment funding crosses back into positive territory, and whether coin-denominated open interest rises alongside it. Positive funding with flat open interest means existing capital is simply changing hands. Positive funding with rapidly expanding open interest means a new leverage cycle has genuinely begun, and at that point liquidation clusters deserve more attention than price targets. In parallel, a clear recovery in crypto-margined collateral from its roughly 11% low would be an early sign that the volatility structure is turning fragile again. Position size should be derived from the distance between the liquidation price and the levels that matter, not from conviction about direction.
Widen the lens and none of this framework is unique to crypto. Traditional futures markets have always used open interest, basis and forced liquidation to locate themselves within a leverage cycle, and the BIS research cited above found that rising carry significantly predicts short futures liquidations over the following month. What is distinctive about crypto is that perpetual contracts compress all of this into a single number refreshed every eight hours, making the temperature of leverage visible in something close to real time. Traders who read that number and traders who watch only price are not looking at the same market.
FAQ
What is the bitcoin funding rate?
Funding is the mechanism perpetual contracts use to keep their price anchored to spot. When the contract trades above spot the rate is positive and longs pay shorts in proportion to position value; when it trades below spot the rate is negative and shorts pay longs. The payment moves directly between traders and the platform takes no share of it. On MEXC, funding on perpetual contracts is generally settled every eight hours, with the exact frequency and rate caps shown on each trading pair's page.
What does a negative funding rate mean?
It means shorts are the more aggressive side and are paying to keep bearish exposure open. As of September 28, BTC perpetual funding averaged roughly minus 0.3% annualized across major exchanges, reflecting cautious sentiment. Deeply negative funding also signals crowding on the short side: in late February the rate reached minus 6% annualized and discussion quickly turned to squeeze risk. Funding tells you who is paying, not where price is going.
Does rising open interest always mean the market is bullish?
No. Open interest only counts contracts that remain open and carries no direction on its own, so it has to be paired with price. Rising open interest while price climbs usually means new longs are entering. Rising open interest while price falls means new shorts are entering. Only by reading open interest, price and funding together can you tell which side the new money has taken.
Why does dollar-denominated open interest differ from coin-denominated?
The dollar series mixes price moves into the measurement, so a rising coin price inflates the number even when contract counts are unchanged. The coin-denominated series removes that effect and gives a cleaner read on actual leverage participation. This year offers the clearest illustration: bitcoin is up roughly 35% from its August low while coin-denominated open interest has fallen almost 20%, and the two views point in opposite directions.
How is basis different from the funding rate?
They measure the same thing through different contract structures, namely the premium the market pays for long exposure. Basis appears on dated futures as the gap between futures and spot, and annualized it is the yield on a cash-and-carry trade. Funding appears on perpetual contracts, which have no expiry and use periodic payments instead of settlement to force convergence. BIS research put average annualized carry across exchanges near 7% between 2019 and 2024.
Why do liquidations cascade?
When margin no longer supports a position, the exchange force-closes it, placing an order into the book in the same direction as the prevailing move. That pushes price further and trips the next tier of positions. On October 10, 2025, more than 1.6 million traders were liquidated for $19.37 billion within 24 hours and perpetual open interest across major exchanges fell 43% in a single day, the most extreme demonstration of the mechanism on record.
Is bitcoin leverage overheated at current levels?
The public data suggests it is not. Coin-denominated open interest sits near yearly lows, funding is negative, crypto-margined collateral has fallen to a record low near 11% of the market, and the most recent deleveraging came without a liquidation wave. That said, Glassnode has flagged that combined futures and options open interest remains above its usual range and that short-term holders are realizing profits at a high rate, and Treasury yields remain elevated, so the assessment needs updating as new data arrives.
Disclaimer
The information above is provided for general market information and analysis only and does not constitute investment advice, financial advice, legal advice, tax advice or a recommendation to trade. Prices of crypto assets and related derivatives can move sharply, and leveraged trading magnifies both gains and losses and can result in the total loss of capital. Past performance, technical indicators, on-chain data and derivatives data do not guarantee future results, and the prices, rates, open interest figures and market data referenced here change over time, so the latest disclosures from the relevant platforms and institutions should be treated as authoritative. Readers should conduct their own research and make decisions based on their own financial circumstances, investment objectives and risk tolerance, consulting a qualified professional where appropriate. The MEXC Crypto Pulse team accepts no liability for any direct or indirect loss arising from the use of this information.
About the Author
James Mitchell specializes in technical analysis, market trends, and trading strategies for both Bitcoin and altcoins. Based in London, he has over 10 years of experience in financial markets. Before joining MEXC Learn, James worked as a senior analyst at a leading European investment firm, where he developed expertise in risk management and quantitative trading. His transition to cryptocurrency markets began in 2017, and he has since become recognized for his data-driven approach. He holds a Master's degree in Financial Economics from the London School of Economics. His analytical approach combines traditional technical analysis with on-chain metrics to provide readers with actionable insights.
Areas of Expertise: Technical Analysis, Market Trends & Cycles, Trading Strategies, Bitcoin & Altcoin Analysis, Risk Management.
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The articles shared on this page are sourced from public platforms and are provided for reference only. They do not represent the position or views of MEXC. All rights belong to James Mitchell. If you believe any content infringes upon the rights of a third party, please contact service@support.mexc.com for prompt removal. MEXC does not guarantee the accuracy, completeness, or timeliness of any content and is not responsible for any actions taken based on the information provided. The content does not constitute financial, legal, or other professional advice, nor should it be interpreted as a recommendation or endorsement by MEXC. For expert insights and in-depth analysis, visit MEXC Learn.
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