股票股指期权：下行升波，可考虑熊市看跌价差策略。

Report Industry Investment Rating - Not provided in the report. Core Viewpoint - The stock index options are experiencing a downward increase in volatility, and a bearish put spread strategy can be considered [2]. Summary by Related Catalogs 1. Option Market Data Statistics - Underlying Market Statistics: The closing prices of major indices and ETFs all declined, with the Shanghai - Shenzhen 300 Index dropping 73.93 points to 4628.14, the CSI 1000 Index falling 87.82 points to 7502.76, and the Shanghai 50 Index decreasing 35.24 points to 3038.43. Trading volumes also generally decreased, such as the Shanghai - Shenzhen 300 Index with a trading volume of 192.09 billion hands, a decrease of 15.27 billion hands [3]. - Option Market Statistics: The trading volumes of most option varieties decreased, while the open - interest of some increased. For example, the trading volume of Shanghai 50 Index options was 33387, a decrease of 7626, and the open - interest was 71949, an increase of 126. The VL - PCR and OI - PCR of different option varieties showed different characteristics, with the CSI 1000 Index options having an OI - PCR of 110.17% [3]. 2. Option Volatility Statistics - Near - month Options: The ATM - IV of most option varieties increased. For instance, the ATM - IV of Shanghai 50 Index options was 13.32%, an increase of 0.17%, and the ATM - IV of Shanghai - Shenzhen 300 Index options was 13.96%, an increase of 1.17%. The HV of most options also increased, and the skew generally decreased [6]. - Next - month Options: The changes in ATM - IV and HV of different option varieties were mixed. For example, the ATM - IV of Shanghai 50 Index options was 15.15%, an increase of 0.18%, while the ATM - IV of CSI 1000 Index options was 20.73%, a decrease of 0.01% [6]. 3. Option Charts for Different Varieties - Index Options (Shanghai 50, Shanghai - Shenzhen 300, CSI 1000): There are charts showing the full - contract PCR, main - contract skewness, volatility cone, and volatility term structure. These charts can help analyze the market sentiment and volatility characteristics of different index options [10][14][23]. - ETF Options (Shanghai 50ETF, Huatai - Baorui 300ETF, etc.): Similar to index options, there are also corresponding charts for each ETF option variety to show the PCR, skewness, volatility cone, and volatility term structure, which are used to analyze the market conditions of ETF options [27][31][40].