股市风险偏好较强，股指震荡上涨

Report Summary 1. Investment Rating No investment rating for the industry is provided in the report. 2. Core Viewpoints - The stock market has a relatively strong risk appetite, and stock indices are oscillating upwards. The trading volume of the Shanghai, Shenzhen, and Beijing stock markets is 1518.2 billion yuan, a decrease of 101.7 billion yuan from the previous day. The trading volume remains above 1.5 trillion yuan, indicating a high - level risk appetite among stock market investors [3]. - The economy showed strong resilience in the second quarter, reducing the short - term expectation of policy intensification. The subsequent incremental positive factors need to wait until October, so the positive policy drive has weakened recently [3]. - Since late June, some stocks have achieved significant gains, and some profit - taking funds have a need to lock in profits. Therefore, the stock indices have a short - term need for technical consolidation. However, external risk factors are easing, domestic economic data shows resilience, the stock market risk appetite is at a high level, and there are few negative factors. In the short term, the stock indices are more likely to rise than fall. Overall, the stock indices are upward - trending in the long - term and will mainly oscillate within a range in the short - term [3]. - The implied volatility of options is currently in the normal range. Considering the long - term upward trend of stock indices, investors can continue to hold bull spreads or ratio spreads for a mild bullish view [3]. 3. Summary by Relevant Catalogs 3.1 Option Indicators - ETF and Index Performance: On August 4, 2025, 50ETF rose 0.49% to 2.890; 300ETF (Shanghai Stock Exchange) rose 0.46% to 4.152; 300ETF (Shenzhen Stock Exchange) rose 0.38% to 4.279; the CSI 300 Index rose 0.39% to 4070.70; the CSI 1000 Index rose 1.04% to 6739.69; 500ETF (Shanghai Stock Exchange) rose 0.76% to 6.335; 500ETF (Shenzhen Stock Exchange) rose 1.08% to 2.537; the GEM ETF rose 0.43% to 2.313; the Shenzhen 100ETF rose 0.31% to 2.886; the SSE 50 Index rose 0.55% to 2769.39; the STAR 50ETF rose 1.19% to 1.10; and the E Fund STAR 50ETF rose 1.22% to 1.08 [5]. - Volume and Open Interest PCR: Different ETF and index options have different volume and open interest PCR values, and most of them have changed compared to the previous trading day. For example, the volume PCR of SSE 50ETF options was 106.66 (previous day: 109.66), and the open interest PCR was 89.70 (previous day: 84.31) [6]. - Implied Volatility and Historical Volatility: The implied volatility and 30 - day historical volatility of different options are also presented. For instance, the implied volatility of SSE 50ETF options' August 2025 at - the - money options was 13.67%, and the 30 - day historical volatility of the underlying was 9.69% [7]. 3.2 Relevant Charts - The report provides a series of charts for different types of options, including the trend of the underlying, option volatility, volume PCR, open interest PCR, implied volatility curves, and the implied volatility of at - the - money options for different terms. For example, for SSE 50ETF options, there are charts showing the SSE 50ETF trend, option volatility, volume PCR, etc. [9][10][11]