Bitcoin Volatility Index Falls to Lowest Since September 2025, While Put Premiums Stay Elevated

Bitcoin has traded in a tight range for weeks, driving options-market volatility gauges sharply lower. Demand for downside protection remains firm, however, with put options still trading at a premium to calls.

CoinDesk reported on August 10 that Bitcoin has moved between $62,000 and $66,000 since early July. Over the same stretch, Volmex's Bitcoin Volatility Index, or BVIV, fell to 35.59%, its lowest level since September 2025. BVIV tracks Bitcoin's 30-day annualized implied volatility and is considered the crypto market's equivalent of the VIX.

Griffin Sears, head of derivatives at crypto prime brokerage FalconX, said the latest decline in BVIV was driven by a broad supply-demand imbalance in the crypto options market. As Bitcoin stayed trapped in a narrow range, demand for large directional bets faded. Meanwhile, Bitcoin miners and corporate treasury teams have increasingly sold call options systematically to generate income from spot holdings, adding to options supply. The summer trading slowdown and cooling in the spot market also pushed realized volatility lower, he added.

Still, the drop in volatility gauges does not necessarily point to market optimism. Overall volatility is low, but put skew remains elevated, Sears said. Investors are still paying a premium for put options as downside protection, making them more expensive than calls. That suggests market participants are not expecting sharp price swings, but remain wary of a deeper bearish turn.

Himanshu Sahay, co-founder and chief technology officer of Bitcoin-backed lending platform Arch, said lower implied volatility can give Bitcoin borrowers a false sense of comfort. When leverage costs fall, positions can build aggressively without sufficient regard for downside protection. Risk has not disappeared; it is simply being underpriced and inadequately hedged. Rather than waiting for volatility to spike, investors should set clear risk parameters in advance so temporary liquidity stress does not trigger forced liquidations.