BlackRock BTC ETF options top offshore rivals

TLDR

Options on BlackRocks iShares Bitcoin Trust (IBIT) have now built more open interest than offshore bitcoin options on Deribit, highlighting a shift toward regulated U.S. venues for BTC risk.

1. IBIT options open interest reached about $27.61 billion on Nasdaq, slightly above Deribits roughly $26.90 billion in BTC options, the first time a U.S. listed product has overtaken it.
2. The IBIT options book is skewed to bullish call positions with longer expiries, signaling institutional and advisor-led demand for regulated, longer-horizon BTC exposure.
3. Key signals to watch are whether this onshore dominance persists, how ETF inflows evolve, and whether regulation keeps favoring listed products over offshore derivatives.

Deep Dive

1. What Actually Changed

On 25 April, open interest in options tied to BlackRocks iShares Bitcoin Trust (IBIT) on Nasdaq hit about $27.61 billion, edging past the roughly $26.90 billion of bitcoin options open interest on Deribit in notional terms, according to Volmex data cited by CoinDesk.

This is the first time a regulated U.S. crypto derivative has surpassed Deribits flagship BTC options market, as highlighted in a detailed IBIT milestone report.

TokenPost similarly notes IBIT options open interest at $27.61 billion versus Deribits $26.9 billion, achieved in roughly two years of IBIT options trading compared with Deribits BTC options history since 2016, underscoring the speed of growth in U.S. listed products.

2. Why This Matters For BTC

IBIT and Deribit serve different client bases. Deribit is the dominant offshore crypto-native venue, while IBIT options are embedded in the U.S. broker and ETF ecosystem, accessible to institutions and many retail investors who cannot legally trade on Deribit.

Analyses of positioning show IBIT options activity leaning more bullish and longer dated, with call structures implying upside targets around bitcoin levels near six figures and average expiries later in the year, while Deribit flows look somewhat shorter term and less aggressively out of the money.

This pattern fits a broader trend where spot bitcoin ETFs are seeing renewed inflows and IBIT often leads those flows, while its options market gives institutions a regulated way to layer hedging, leverage, and covered-call strategies on top of ETF holdings.

3. What To Watch Next

First, watch whether IBITs options open interest stays above Deribit for several weeks. A brief spike could be noise, but a persistent lead would signal a structural shift toward onshore derivatives.

Second, track spot ETF flows together with options positioning. Sustained inflows into IBIT and peers, combined with growing call open interest, would support a narrative of long-horizon institutional accumulation rather than just short-term speculation.

Third, keep an eye on U.S. policy and market structure. As regulators refine ETF and derivatives rules, more products like IBIT could deepen listed liquidity, while any clampdown on offshore venues would further push activity into regulated channels rather than back to unregulated exchanges.

Conclusion

BlackRocks IBIT options overtaking Deribit in open interest marks a symbolic and practical shift, showing that a large share of bitcoin risk-taking is migrating into regulated U.S. products.

For crypto users, it means that reading BTCs next moves increasingly requires watching ETF options and flows alongside traditional offshore derivatives, since institutions are now expressing much of their bitcoin view in those listed markets.