股票股指期权：隐波持稳，可考虑卖出宽跨式策略

Report Summary 1. Investment Rating The report does not mention the industry investment rating. 2. Core View Stock index options' implied volatility is stable, and investors can consider selling strangles [2]. 3. Summary Based on Relevant Contents Market Data Statistics - Underlying Market: The closing prices of major indexes and ETFs mostly declined. For example, the Shanghai Composite 50 Index closed at 3050.42, down 19.11 points; the CSI 300 Index closed at 4691.97, down 24.05 points [3]. - Option Market: The trading volume of most options decreased, while the open interest increased. For instance, the trading volume of SSE 50 Index Options was 33,391, down 6,263; the open interest was 64,084, up 1,381 [3]. - Option Volatility: The ATM - IV of most options showed different degrees of change. For example, the ATM - IV of SSE 50 Index Options (near - month) was 15.14%, down 0.33% [6]. Option - Specific Analysis - SSE 50 Index Options: Multiple charts are provided, including the volatility chart, PCR chart, and volatility cone chart, to show the option's volatility, contract ratio, and volatility range over different periods [10][11]. - CSI 300 Index Options: Similar to SSE 50 Index Options, multiple charts are used to analyze its volatility, contract ratio, and other features [14][16]. - CSI 1000 Index Options: The report presents charts to analyze its volatility, PCR, and volatility term structure [19][20][21]. - ETF Options: Options such as SSE 50 ETF Options, Huatai - Berry 300 ETF Options, and others are analyzed through various charts, including volatility, PCR, and volatility cone charts [23][24][30].