Volmex has launched the BVIV Bitcoin implied-volatility index perpetual contract on Hyperliquid. BVIV (a gauge of expected price variability) is derived from Deribit and OKX options data and measures traders' expectations for Bitcoin's volatility over the next 30 days, rather than predicting whether the spot price will rise or fall. Recent BVIV readings were in the mid-to-high range above 30 points. Each index point settles at 1 USDC, while the contract uses isolated margin, allows up to five times leverage and applies hourly funding rates. An open-interest limit is also in place during the initial launch period, Bitcoin News said in a post on X reported by Odaily Planet Daily.