The options/futures OI ratio represents the proportion of open interest in options contracts relative to futures contracts. A higher ratio indicates a greater emphasis on options trading than futures trading.
Bitcoin’s options/futures open interest (OI) ratio has consistently outpaced Ethereum’s, raising questions about the underlying drivers. Data from CoinGlass shows that Bitcoin’s ratio has been climbing from 57.80% to 69.60% since the beginning of March, while Ethereum’s ratio has risen more modestly from 26.9% to 32.98%.
This gap, with Bitcoin’s ratio roughly double Ethereum’s each day, suggests a stronger preference for options over futures among Bitcoin traders. To understand why, we can examine the options OI and price performance for both assets over this period alongside broader market trends.
First, the scale of options activity provides context. Bitcoin’s options OI grows from $28.09 billion on March 2 to $34.82 billion on March 6, a 24% increase.
Ethereum’s options OI, while also rising 27% from $5.10 billion to $6.47 billion, remains 5–6 times smaller in absolute terms. This disparity reflects Bitcoin’s larger market cap, which historically runs 3–5 times higher than Ethereum’s, attracting more trading volume and liquidity. Greater liquidity draws both institutional and retail traders to Bitcoin options, often used for hedging or leveraging price movements in a more established market. Spot Bitcoin ETF’s Authorized Participants use both futures and options to generate revenue while minimizing risk in facilitating baskets of Bitcoin to fulfill ETF inventories.
Price performance in March further highlights the divergence. Bitcoin’s price increases from $84,413 on March 1 to $90,624 on March 6, a 7.4% gain, despite volatility with a peak at $94,238 on March 3 and a dip to $86,212 on March 4. Starting at $2,216, Ethereum’s price rises to $2,297 by March 6, a 3.7% gain, but experiences a sharper drop from $2,519 on March 2 to $2,145 on March 3. Bitcoin’s stronger net gain and higher volatility align with its rising options/futures OI ratio, as traders likely use options to capitalize on or hedge against these swings.
Ethereum’s more modest price movement and lower absolute price may reduce the perceived need for options-based strategies, keeping its ratio lower despite steady options OI growth.
Market size and liquidity play a significant role in Bitcoin’s higher ratio. With a larger market, Bitcoin naturally sees more absolute trading activity, supporting a robust options market. Higher liquidity makes Bitcoin a preferred choice for traders looking to manage risk, mainly through options offering flexibility over futures. With a smaller market, Ethereum sees a greater reliance on futures for directional speculation, reflecting its less developed derivatives ecosystem.
Hedging demand also contributes to the gap. With swings like the 11.7% rise and 8.5% drop, Bitcoin’s price volatility prompts traders to favor options for risk management, especially given Bitcoin’s dominant role in the crypto space. This is evident in the options OI growth tracking price recovery after March 4. Ethereum’s volatility, including a 14.9% drop, is notable but less impactful in absolute terms due to its lower price, resulting in a lower options/futures OI ratio as traders lean toward futures.
Institutional participation further widens the divide. Bitcoin has seen greater institutional adoption, particularly since the approval of spot Bitcoin ETFs in 2024, bolstering its derivatives market. Institutions often prefer options for capital efficiency and flexibility, boosting Bitcoin’s options/futures OI ratio. Ethereum, while benefiting from spot ETH ETFs trading since mid-2024, lags behind.
The weaker performance of Ethereum ETFs, with year-to-date returns ranging from -1.78% to -36.48%, signals lower investor confidence compared to Bitcoin ETFs, which, despite negative YTD returns, manage larger asset bases and higher trading volumes—like the iShares Bitcoin Trust, which has $57.8 billion in assets versus the iShares Ethereum Trust’s $376.60 million.
This underperformance in Ethereum ETFs likely discourages institutional adoption, as institutions prioritize assets with stronger market validation and liquidity. Reduced institutional interest in Ethereum ETFs limits the growth of its options market, as institutions are key drivers of options activity for hedging and speculation. Consequently, Ethereum’s options/futures OI ratio remains lower, reflecting a less mature derivatives market compared to Bitcoin’s.
Finally, market maturity gives Bitcoin an advantage. Bitcoin has a longer history and a more developed options market. Traders view Bitcoin options as a reliable tool for speculation or risk management, while Ethereum’s options market, still maturing, sees less activity relative to futures.
The data from March 2025 supports this, with Bitcoin’s stronger price performance, larger options market, and greater institutional backing driving its higher options/futures OI ratio. Despite growth in options OI, Ethereum remains constrained by its smaller market and weaker institutional adoption, keeping its ratio lower and highlighting Bitcoin’s dominance in the crypto derivatives market.
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