Binance has overtaken CME Group in Bitcoin futures open interest for the first time since late 2023, reversing a market structure trend that had been widely associated with the rise of institutional participation in crypto derivatives.
Binance now holds roughly 148,500 BTC in open interest, worth about $9.6 billion, compared with approximately 102,840 BTC, or $6.7 billion, at CME.
The gap of around 45,000 BTC is significant, but the shift does not necessarily mean institutions are abandoning Bitcoin.
Instead, it reflects a combination of weaker basis-trade economics, capital moving toward perpetual futures, changing regulatory conditions and a different type of positioning among the institutions that remain active on CME.
CME’s decline has been building for months
CME open interest has fallen for five consecutive months.
At the beginning of 2026, CME held around 175,000 BTC in Bitcoin futures open interest.
By April, that figure had fallen to roughly 120,000 BTC.
By August, it was near 103,000 BTC.
That represents a decline of more than 40% in roughly eight months, or about 72,000 BTC of lost open interest.
At current prices, the reduction represents more than $4.5 billion in notional exposure.
The basis trade was a major driver of CME’s earlier dominance
A key reason CME became the leading venue was the cash-and-carry basis trade.
The strategy is market neutral.
A trader buys spot Bitcoin or shares of a spot Bitcoin ETF and simultaneously shorts Bitcoin futures trading at a premium.
The spread between the spot and futures prices can then be captured as yield.
During 2024 and the first half of 2025, annualized Bitcoin futures basis levels frequently exceeded 15% to 20%.
Those returns attracted hedge funds, proprietary trading firms and other institutional participants.
Falling spreads destroyed the arbitrage incentive
The strategy became much less attractive as Bitcoin declined from levels above $120,000 into the $60,000 to $80,000 range during the first half of 2026.
The annualized three-month basis on CME compressed to roughly 3%.
That placed it below the approximately 3.8% yield available on two-year U.S. Treasuries.
At that point, the trade no longer offered a compelling reward for the capital, margin requirements, counterparty exposure and operational complexity involved.
For many institutional desks, closing the trade became a simple economic decision.
The unwind was mechanical rather than panicked
The decline in CME open interest should therefore not automatically be interpreted as institutions becoming bearish on Bitcoin.
Much of the previous activity came from arbitrage positions.
When the spread disappeared, traders closed both sides of the trade.
That meant reducing short futures exposure while also selling or unwinding the corresponding spot or ETF holdings.
The result was lower CME open interest and weaker ETF flows without necessarily reflecting a fundamental change in long-term Bitcoin conviction.
Capital shifted toward perpetual futures
Some capital moved toward crypto-native perpetual contracts.
Perpetual futures do not expire and use funding rates to keep prices close to spot markets.
They account for roughly 90% of global crypto derivatives volume.
Binance controls a large share of that activity, with OKX and Bybit also important venues.
During the first quarter of 2026, Binance captured approximately 40% of perpetual futures activity, according to the source.
Perpetuals offer greater flexibility for some trading firms
The appeal is primarily structural.
Perpetuals eliminate quarterly contract rolls.
They offer continuous liquidity.
Margin systems can be more flexible.
For market-neutral desks, funding rates can also provide yield opportunities.
These characteristics make perpetuals attractive to crypto-native market makers, quantitative firms and smaller hedge funds operating from jurisdictions where offshore derivatives trading is permitted.
The migration does not mean every major institution is moving offshore
The shift should not be overstated.
The source specifically notes that this does not mean large traditional banks are simply opening accounts on Binance.
The migration appears concentrated among firms that already operate globally and have access to offshore venues.
For those traders, staying on CME made sense while the basis trade was profitable.
Once the economics deteriorated, other venues became more attractive.
CME responded with 24/7 crypto trading
CME attempted to reduce one of its main structural disadvantages by launching round-the-clock cryptocurrency futures and options trading on May 29, 2026.
The change removed the traditional weekend gap.
That was important because Bitcoin trades continuously while conventional futures markets historically had scheduled closures.
The first weekend reportedly generated more than 7,200 contracts and around $50 million in notional volume.
Average daily volume across CME’s crypto complex reached 407,200 contracts, up 46% year over year.
Longer trading hours could not restore the basis
The problem was that CME’s decline was not primarily caused by its opening hours.
It was caused by yield compression.
Allowing traders to hedge over the weekend improves execution and risk management, but it does not recreate a 15% or 20% annualized basis.
That helps explain why open interest continued to decline through June, July and August despite 24/7 access.
Regulated perpetual futures are now entering the U.S.
Another major development is taking place onshore.
On May 29, the CFTC approved Kalshi’s BTCPERP contract, described in the source as the first Bitcoin perpetual futures product listed on a regulated U.S. exchange.
This opened a new competitive front.
Perpetual futures had historically been associated almost entirely with offshore exchanges.
Now a version of the product is beginning to appear inside the U.S. regulatory framework.
Kalshi gained early traction
Kalshi reportedly generated more than $5.5 billion in cumulative perpetual futures volume within weeks of launch.
It later added Ethereum, Solana and XRP perpetual contracts.
If regulated perpetual markets continue growing, institutional traders may gain access to the same contract structure that made offshore platforms popular without leaving regulated U.S. venues.
That could eventually pressure both offshore exchanges and CME’s traditional quarterly futures model.
CME is challenging the regulatory framework in court
CME has filed a federal lawsuit against the CFTC and its chairman.
The exchange argues that perpetual futures should be classified as swaps rather than futures.
That distinction could materially change the regulatory requirements applied to the contracts.
The case remains unresolved.
Its outcome could influence how U.S. crypto derivatives markets develop over the next several years.
CME dominance may have overstated institutional conviction
The reversal also forces a reassessment of what CME open interest actually represented.
For years, rising CME activity was often used as evidence that institutional investors were becoming structurally bullish on Bitcoin.
But a substantial portion of those positions appears to have been associated with basis arbitrage.
A fund buying a spot ETF and shorting CME futures to capture a spread is very different from a long-only investor buying Bitcoin exposure because of a conviction about future appreciation.
Both can increase reported institutional activity, but the economic motivations are not the same.
ETF outflows also reflected basis unwinds
U.S. spot Bitcoin ETFs recorded $5.4 billion in net outflows during the first half of 2026.
Part of those redemptions was linked to basis-trade closures.
When arbitrageurs exited, they closed both their ETF holdings and futures shorts.
That distinction matters because the headline interpretation of institutions “selling Bitcoin” can obscure the mechanics underneath the flow.
Institutional adoption has not disappeared
Several other indicators of institutional involvement remain intact.
The source notes that U.S. spot Bitcoin ETFs still control more than $100 billion in assets.
Charles Schwab launched Bitcoin and Ethereum trading on its $13 trillion platform in May 2026.
Citi is developing digital-asset custody infrastructure.
These developments indicate that institutional access continues to expand even as CME loses market share.
The trend could still reverse
The Binance-CME crossover may not be permanent.
The basis trade is cyclical.
If Bitcoin enters another strong rally and futures premiums rise back toward high single digits or double digits, institutional arbitrage capital could return quickly.
A sustained annualized CME basis above roughly 8% would make the trade much more attractive again.
Stronger spot ETF inflows could reinforce that process.
CME still has structural advantages
CME offers regulated clearing, standardized margining and an established institutional framework.
Its 24/7 trading infrastructure is also still relatively new.
If liquidity deepens across weekends and overnight sessions, some institutional users may value those characteristics more heavily.
Any regulatory pressure on offshore platforms could also redirect activity back toward CME and other U.S.-regulated venues.
Hedge funds on CME are changing their behavior
One of the more important signals is the shift in hedge fund positioning.
During most of 2024 and 2025, leveraged funds on CME maintained persistent net short positions.
That pattern was consistent with the basis trade.
More recently, CFTC positioning data reportedly shows hedge funds moving to net long exposure.
That suggests that the remaining CME participants may increasingly be making directional Bitcoin bets rather than running market-neutral arbitrage.
Smaller CME open interest could become more informative
If that shift continues, CME may hold less total open interest but provide a more meaningful signal of institutional conviction.
A net long position reflects a direct view on Bitcoin’s price.
That is economically different from short futures used only to hedge spot ETF exposure.
The quality of institutional participation may therefore be changing even as the quantity of contracts declines.
What matters next
Several variables will determine whether Binance’s lead becomes structural.
The first is the Bitcoin futures basis.
If it rises substantially, the basis trade could return.
The second is U.S. spot ETF flow.
The third is the growth of regulated perpetual futures on platforms such as Kalshi.
Binance’s regulatory position also matters because restrictions affecting offshore exchanges could quickly redistribute liquidity.
Finally, CFTC positioning data will help show whether hedge funds remain net long.
Conclusion
Binance has reclaimed the lead in Bitcoin futures open interest from CME, but the reversal is more complex than a simple institutional retreat.
CME’s decline was driven largely by the collapse of the cash-and-carry trade as futures basis yields fell below competing fixed-income returns.
Some activity migrated toward perpetual futures, while the institutions that remain on CME appear to be taking more directional positions.
Final Takeaway
The main lesson is that CME open interest was never a perfect measure of institutional conviction. A large share reflected arbitrage rather than outright bullish exposure. Binance’s return to the top shows where derivatives liquidity is moving today, but whether that shift lasts will depend on basis spreads, regulation, ETF flows and the expansion of regulated perpetual markets in the United States.
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