IBIT options hit $27.6 billion in open interest on Friday, edging past Deribit's $26.9 billion and marking the first time a regulated US venue has led the global bitcoin derivatives market.
Options tied to BlackRock's iShares Bitcoin Trust crossed $27.61 billion in open interest on Nasdaq on Friday, overtaking Deribit's $26.90 billion for the first time — a threshold the offshore exchange had defended unchallenged since it launched in 2016.
The crossover, tracked by volatility analytics firm Volmex, didn't arrive with a bang. There was no single catalyst, no sudden institutional stampede. IBIT options have been closing the gap steadily for months, absorbing flows from pension consultants, macro hedge funds and registered investment advisers who wouldn't touch an offshore venue if you paid them. Now they don't have to.
What makes the milestone striking is the speed. Deribit spent the better part of a decade building its position as the default venue for bitcoin options — the place where the sophisticated money priced volatility, constructed spreads and expressed directional views with leverage. IBIT options, by contrast, have existed for roughly two years. That a product listed on a US national securities exchange could close a decade-long head start in 24 months tells you something about where capital formation is actually happening.
The positioning data reveals how different the two markets have become. IBIT flows skew bullish: the bulk of open call interest points to expectations of bitcoin trading near $109,700 in the coming months, roughly 41 per cent above the current spot price of around $77,400. On Deribit, the bias is more measured — concentrated call strikes suggest a target closer to $106,000, and the preferred expiry is August rather than IBIT's October. The gap isn't enormous, but it's consistent with a regulated market that attracts longer-duration institutional capital versus an offshore one that still caters to faster-moving traders.
The shift has been building since bitcoin spot ETFs launched in January 2024 and remade the market's plumbing in ways that are still unfolding. Spot ETFs gave institutions a familiar wrapper for directional exposure; options on those ETFs gave them the tools to manage risk, generate yield and construct the kind of multi-leg strategies that any equity portfolio manager already runs on the S&P 500. The infrastructure existed. All that was missing was the underlying, and BlackRock delivered it.
BlackRock's IBIT itself now holds more than 806,700 bitcoin — a figure that quietly makes it the fastest-growing ETF in history by virtually any measure. The options market layered on top of that position is not a sideshow; it is the mechanism through which institutional allocators express conviction, hedge tail risk and — critically — determine how much of their portfolio can sit in bitcoin without breaching internal volatility limits. Without a liquid options market, many of those allocators simply couldn't be there at all.
For Deribit, the implications are uncomfortable but not existential. The exchange still dominates ether options and retains a loyal base of crypto-native traders who value its margin model, 24/7 availability and lack of US regulatory overhead. But bitcoin options are the crown jewel of the crypto derivatives business — the highest-volume, highest-margin product class — and losing the notional lead to a venue that didn't exist two years ago is hard to spin as anything other than a structural loss.
Coinbase's $1.4 billion acquisition of Deribit, completed earlier this year, was explicitly pitched as a play for institutional derivatives flow. The timing now looks prescient — or desperate, depending on how you read it. If the institutional bid is migrating onshore regardless, owning the leading offshore venue is less about capturing growth and more about preventing irrelevance.
None of this means the offshore market vanishes. Crypto derivatives still trade around the clock, across jurisdictions, in ways that no single regulatory perimeter can contain. But the centre of gravity has shifted. The marginal institutional dollar — the one attached to a compliance department, a fiduciary duty and a board that wants to see regulated counterparties — is flowing through Nasdaq, not through a Panamanian entity accessible only via VPN.
Two years ago, the idea that a BlackRock product would lead the global bitcoin options market would have sounded like a thought experiment at a conference panel. On Friday, it became a data point. The offshore era isn't over, but its monopoly is.
