Binance Moves Ahead of CME in Bitcoin Futures Open Interest as Basis Trade Fades

How CME built its lead

A large share of CME’s growth had been tied to basis trading rather than simple directional exposure to Bitcoin. The core strategy involved buying spot Bitcoin, or exposure through products such as the IBIT ETF, while selling CME futures at a premium and collecting the spread.

When annualized basis returns were in the 15% to 20% range, the trade offered an attractive yield for hedge funds and institutional trading desks. That encouraged large allocations into CME futures and reinforced the view that rising open interest on the exchange reflected deepening traditional finance participation in crypto derivatives.

Why positions were unwound

That setup weakened as Bitcoin moved and futures premiums compressed. By mid-2026, the annualized basis had fallen to around 3%, below the yield available on two-year U.S. Treasuries, eroding the economics of the trade.

As the spread narrowed, institutions unwound positions and CME open interest declined. The retreat appears to have been driven more by the collapse in yield than by any single operational issue at the exchange, raising the possibility that some of the earlier institutional demand was tied to arbitrage conditions rather than long-term conviction in Bitcoin itself.

Where activity shifted

The capital leaving CME did not simply disappear. Some of it returned to direct spot holdings, while a meaningful share appears to have migrated to offshore perpetual futures, which remain central to crypto derivatives trading.

Binance is a major venue in that market, controlling roughly 33% of centralized perpetual futures and capturing about 40% of perpetual futures activity in early 2026, according to the source material. Perpetual contracts offer continuous liquidity and looser margin requirements, features that can appeal to market makers and hedge funds seeking yield.

The reported migration has been concentrated among crypto-native market makers and smaller hedge funds, particularly those registered in places such as Singapore, Dubai, or the British Virgin Islands, where trading on offshore venues involves less regulatory friction.

CME’s response and the onshore challenge

CME introduced 24/7 trading for crypto futures and options on May 29, 2026, aiming to close weekend hedging gaps and make its market structure more competitive. But the shift in open interest continued after the launch, suggesting that around-the-clock access did not solve the main problem.

According to the source, the issue was primarily the collapse in contango and the shrinking basis, not trading hours. At the same time, the U.S. market has started to develop its own version of perpetual futures. The CFTC approved Kalshi’s BTCPERP, described as the first Bitcoin perpetual futures product on a regulated U.S. exchange, while CME sued the regulator over the classification of perpetual futures. Those developments point to a possible regulatory and competitive reshaping of the domestic crypto derivatives market.

What to watch next

The reversal does not necessarily settle the question of whether institutional participation is fading or simply moving between venues and strategies. The source notes that hedge fund positioning on CME has shifted from net short, a pattern associated with basis arbitrage, to net long, which may indicate more directional positioning.

Whether Binance’s lead persists will likely depend on several factors already visible in the market: if futures premiums widen again, capital could return to CME; if liquidity builds around newly introduced 24/7 trading or regulated perpetual products, onshore venues could recover share; and if offshore regulation tightens, activity could move back toward regulated exchanges. For now, the change in rankings highlights a more fragmented market in which open interest alone may say less about institutional conviction than it once appeared to.