Bitcoin's derivatives market is showing a significant shift in trader sentiment. For the first time in 12 months, options traders are paying more for upside protection than downside insurance, according to derivatives data cited by Reuters. This shift occurred when the 25-delta skew turned positive on August 20, indicating traders began favoring bullish calls over protective puts.
The timing comes as bitcoin trades near $78,000, roughly $48,000 below its October 2025 peak. Despite the bullish positioning, the cryptocurrency has yet to rally significantly in response to the sentiment change.
Futures Open Interest Surges
Bitcoin futures open interest has swelled to $52.64 billion, with 676,820 BTC worth of contracts outstanding as of September 14. Binance holds the largest share with $11.11 billion in open interest, representing 21.1% of the total. CME follows with $8.45 billion (16.04%), while Gate, Bybit, MEXC, and OKX hold $4.94 billion, $4.83 billion, $4.39 billion, and $2.78 billion respectively.
Over 24 hours, futures open interest increased 2.33%, suggesting traders are adding leverage despite some momentum loss in shorter timeframes.
Options Market Tilts Toward Calls
Call options now represent 61.39% of total options open interest, compared with 38.61% for puts. In absolute terms, calls account for 305,530.06 BTC in open interest versus 192,126.29 BTC in puts. This marks a substantial departure from the protective positioning traders maintained throughout the past year.
The largest Deribit positions are clustered at strike prices ranging from $70,000 to $100,000. The September 25 $70,000 call holds the most open interest at 10,956.7 BTC, followed by the $85,000 call with 9,492.8 BTC.
Max Pain Levels and Price Dynamics
Deribit's September 25 expiration carries a max pain level near $72,000—the price at which the greatest value of outstanding options would expire worthless. This level sits below bitcoin's current price, suggesting some cushion for traders. The December 25 expiration also shows a large notional block with max pain near $71,000.
Binance's max pain levels paint a slightly less bearish picture, with September 25 positioned around $75,000 and later expirations ranging between roughly $70,000 and $80,000.
Sentiment Versus Prediction
While the shift to bullish positioning is notable, traders have assigned minimal probability to bitcoin reclaiming its October 2025 peak above $126,000. December options show approximately $710 million positioned at the $80,000 strike and $530 million at $100,000, indicating measured expectations for near-term moves.
The bullish skew reflects changed trader sentiment after months of defensive positioning, but derivatives data represents market expectations rather than guarantees of future price movement.
