The BitVol index, launched by financial index company T3 Index and Bitcoin options trading platform LedgerX, has dropped to 50.39, a daily decrease of 0.55%. The BitVol index measures the expected implied volatility derived from tradable Bitcoin option prices over 30 days. Implied volatility represents the market participants' views and expectations for the future of the market and is considered to be closest to the actual volatility at that time.