股票股指期权：正偏增加，看涨情绪上升，股指期权临近到期

Report Summary 1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoint As of July 17, 2025, the positive skew of stock index options has increased, indicating a rise in bullish sentiment, and the index options are approaching expiration [1]. 3. Summary by Relevant Catalog 3.1 Option Market Data Statistics - Underlying Market Statistics: The closing prices of the Shanghai Stock Exchange 50 Index, CSI 300 Index, and CSI 1000 Index were 2744.26, 4034.49, and 6535.67 respectively, with increases of 3.36, 27.29, and 73.61. The trading volumes were 36.15 billion, 161.25 billion, and 227.83 billion hands respectively, with changes of 1.91 billion, 10.22 billion, and 7.60 billion hands [2]. - Option Market Statistics: The trading volume and open interest of various options showed different changes. For example, the trading volume of Shanghai Stock Exchange 50 Index Options was 39,744, a decrease of 2,611, and the open interest was 77,564, an increase of 2,283 [2]. 3.2 Option Volatility Statistics - Near - month Volatility: The ATM - IV of Shanghai Stock Exchange 50 Index Options was 13.16%, with a change of 0.10%. The ATM - IV of CSI 300 Index Options was 11.69%, with a change of 0.81% [5]. - Next - month Volatility: The ATM - IV of Shanghai Stock Exchange 50 Index Options was 14.31%, with a change of 0.43%. The ATM - IV of CSI 300 Index Options was 14.05%, with a change of - 0.13% [5]. 3.3 Option Index Data Statistics No specific text description provided, but there are multiple charts for different option types, including PCR charts, skewness charts, volatility cone charts, and volatility term structure charts, which visually show the characteristics and trends of each option [9][13][22].