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The era of "risk-free arbitrage" gaps in Bitcoin CME is over! Wall Street accelerates the absorption of arbitrage profits

Starting from May 29, the Chicago Mercantile Exchange (CME Group) will switch to 24/7 around-the-clock trading for cryptocurrency futures and options!

Coincidentally, today is May 29. If this change truly takes effect, then the "CME Bitcoin price gap"—a trading signal that countless traders used for arbitrage—can essentially be declared history!

Of course, this is far more than just extending trading hours to 24/7.

1. What does the CME price gap really mean?

Simply put, it’s an arbitrage bug between Bitcoin spot and futures prices. Previously, futures contracts on CME were traded according to traditional financial hours—trading from Sunday night to the following Friday afternoon, with no trading during Saturday and Sunday daytime.

This raises a key issue: Bitcoin spot markets trade 24/7, without breaks.

As a result, every Sunday night when CME opens, Bitcoin futures prices tend to fluctuate, as they need to catch up with the weekend’s spot price changes.

For example, the most extreme case occurred on March 2, 2025. That weekend, news of the U.S. Bitcoin strategic reserve was released, causing the market capitalization of Bitcoin to surge nearly $300 billion. When CME opened that Sunday night, Bitcoin futures prices skyrocketed by $10,000.

Over time, this kind of CME Bitcoin futures price gap became a signal for arbitrage in the crypto space.

Short-term leveraged traders generally assume that CME’s price gaps will eventually be filled in the future Bitcoin spot price trend. It’s less a strategy and more a superstition, partly based on trading pattern recognition.

After 24/7 trading, do CME price gaps still exist?

From CME’s trading rules, the traditional gap between Friday’s close and Sunday night’s open no longer exists, because there’s no longer a closing or halt period.

However, it’s impossible for CME to have no gaps at all.

CME isn’t truly 24/7 trading—it's just close. As the world’s largest derivatives exchange, CME still maintains some maintenance windows—two minutes pause at each weekday close, and a two-hour window on Saturdays.

But, the halts and closures for crypto futures and options on CME have shifted from two days to just two hours. The result is that future Bitcoin futures and spot price gaps are likely to be much smaller in number, and the price differences will be less pronounced—what used to be a canyon might now be just a crack.

2. What does this mean for trading strategies?

The underlying logic of CME gap-filling strategies is deterministic—they exist because CME halts trading. When the halt window shrinks from 48 hours to 2 hours, this strategy is already halfway there.

However, it doesn’t mean traders won’t still bet around these two-hour windows. The simple, brute-force logic that gaps will always be filled in subsequent trading sessions no longer holds.

CME has now approved designated market makers (DMMs) authorized by the U.S. Commodity Futures Trading Commission (CFTC) to provide weekend market liquidity, but no one can guarantee that these market makers’ depth can match that of weekdays.

3. So, after CME pushes for 24/7 trading, will Bitcoin’s price go up or down?

No one can answer this question with certainty. But 24/7 trading can significantly reduce structural cost frictions between markets, and it’s not a demand catalyst.

The result is lower trading costs, improved hedging efficiency for Wall Street institutions, and noticeably better pricing efficiency. But none of this necessarily means more people will buy Bitcoin; rather, buying Bitcoin becomes more seamless.

Therefore, what truly drives Bitcoin’s price movements now are geopolitical tensions like the US-Iran situation, inflation data, changes in interest rate cut expectations, and liquidity environments. In a macro environment of adversity, CME’s move to 24/7 trading won’t change the overall trend of the crypto market.

However, if macro conditions start to improve (such as easing Middle East geopolitical risks or a reversal in Federal Reserve rate cut expectations), the liquidity boost from CME’s 24/7 trading could indeed become a tool for Wall Street institutions to increase their positions in derivatives. $TSM