BlackRock's Bitcoin ETF Achieves Major Milestone, Solidifying Crypto's Mainstream Status

A notable development occurred on Friday, indicating the accelerating pace of institutional investment in the bitcoin market, which has long been driven by individual investors. This is evident in the growth of options linked to BlackRock's bitcoin exchange-traded fund (ETF), IBIT, which have surpassed the total bitcoin options trading on the offshore platform Deribit. Notably, IBIT options have bridged the gap with Deribit's bitcoin options market in just two years, despite Deribit's head start since 2016. On Friday, the open interest in IBIT options contracts on Nasdaq reached $27.61 billion, slightly exceeding the $26.90 billion in Deribit's bitcoin options, according to data from Volmex. This milestone signifies that the regulated, institutional-grade bitcoin investment and derivatives infrastructure in the US is now on par with the offshore market. Furthermore, a thriving, regulated market in the US could encourage more Wall Street institutions to explore digital assets, ultimately leading to more mature price discovery. Deribit's Global Head of Retail Sales and Business, Sidrah Fariq, views IBIT's rise as a positive development for the broader crypto derivatives ecosystem. "US retail investors can access regulated leverage and options exposure through iShares Bitcoin Trust (IBIT) options, which is further supported by the current macro environment of supply chain uncertainty, energy shocks, and geopolitical risks, driving demand for hedging and options strategies," Fariq told CoinDesk. Options are derivative contracts that grant the purchaser the right to buy or sell the underlying asset at a predetermined price at a later date. Analysts use open interest as a measure of market size and participation, with higher open interest indicating a deeper and more liquid market. Traders utilize options to hedge existing positions, speculate on price direction, and generate income on coin/ETF holdings. The covered call strategy, which involves holding the ETF and shorting IBIT calls at levels above the ETF's current market price, is a popular income-generating strategy. Traders have been employing this strategy with actual BTC via Deribit for years. Although the two markets now match in scale, they differ in shape, revealing distinct trader sentiments. According to Volmex, the bulk of open interest in IBIT call options is concentrated at strike levels equivalent to bitcoin trading around $109,709, or roughly 41% above the current price of $77,400. In contrast, Deribit options positioning is more conservative, with call open interest clustered around levels equivalent to roughly $106,000 in BTC terms. "Onshore call OI is concentrated roughly 4 percentage points further out-of-the-money than offshore, and the onshore average delta is slightly lower. This is consistent with onshore flow being dominated by retail upside speculation and systematic call overwriting programs, both of which concentrate OI in further-OTM strikes," Volmex noted. Put positioning is largely aligned across venues, with open interest concentrated around the $63,500 strike. ETF holders tend to be more patient, with options having expiry dates that determine contract settlement. Analysis of activity across both markets suggests that, on average, October 2026 expiries are preferred in IBIT, while August expiries dominate on Deribit. "IBIT options are approximately two months longer-dated on an OI-weighted basis. The gap is roughly symmetric across puts and calls, suggesting it reflects the underlying holder base, longer-horizon ETF investors onshore versus more tactical positioning offshore, rather than asymmetric demand for protection or upside," Volmex observed. Lastly, IBIT's implied volatility is higher than the implied volatility derived from Deribit's BTC options. Volmex attributes this premium to a structural quirk, where ETF holders cannot easily short bitcoin directly, leading them to buy put options as their only available hedge, which keeps IBIT's implied volatility slightly elevated. Overall, IBIT's rapid rise in the options market is striking, and it now appears to rival Deribit in scale. However, the two are not direct substitutes, as IBIT options primarily cater to regulated, onshore investors accessing bitcoin exposure through traditional brokerage channels, while Deribit remains the go-to platform for global investors. "I don’t see this as competition. If anything, it expands the market. As more participants get comfortable trading options via IBIT, it ultimately feeds into the broader ecosystem, and venues like Deribit benefit from increased sophistication and flow," Fariq said.