波动率数据日报-20250725

Group 1: Volatility Index Explanation - The financial option implied volatility index reflects the 30 - day implied volatility (IV) trend as of the previous trading day, while the commodity option implied volatility index is obtained by weighting the IVs of the two - strike options above and below the at - the - money option of the main contract month, reflecting the IV change trend of the main contract [3] - The difference between the IV index and historical volatility (HV) indicates the relative level of IV to HV. A larger difference means a higher IV relative to HV, and a smaller difference means a lower IV relative to HV [3] Group 2: Volatility Index Charts - There are multiple charts showing the IV, HV, and IV - HV differences of various financial and commodity options, including 300 - stock index, 50ETF, 1000 - stock index, 500ETF, etc., as well as commodities like cotton, rubber, methanol, PTA, crude oil, etc., over different time periods from 2019 to 2025 [4][5][6] Group 3: Implied Volatility and Historical Volatility Quantiles - Implied volatility quantiles represent the current level of a variety's IV in history. A high quantile means high current IV, and a low quantile means low current IV. Volatility spread refers to the difference between the IV index and historical volatility [20] - Quantile rankings are provided for different options such as PVC, PTA, 300 - stock index, 50ETF, cotton, iron ore, etc., with specific quantile values given [21]