According to BlockBeats, on December 13, the BitVol index launched by T3 Index and LedgerX rose to 64.62, a single-day increase of 0.91%.
The BitVol Index measures the 30-day expected implied volatility derived from Bitcoin options prices. Implied volatility is inverted using the B-S option pricing formula.
The actual price of an option is formed by competition among traders, and the implied volatility represents the market participants' views on the future market and is considered to be the closest to the actual volatility.