股市成交缩量，股指震荡下跌

1. Report Industry Investment Rating No information about the industry investment rating is provided in the report. 2. Core Viewpoints of the Report - Today, all stock indices fluctuated and declined. The total market trading volume of the stock market was 1.75 trillion yuan, a decrease of 46.3 billion yuan compared to the previous day. The recent contraction in stock market trading volume is mainly due to the lack of market driving forces and the decline in the enthusiasm of capital trading [3]. - The Central Economic Work Conference continued to emphasize a more proactive fiscal policy and a moderately loose monetary policy. However, the aggregate policy did not exceed expectations, shifting from "extraordinary counter - cyclical" to "both counter - cyclical and cross - cyclical." This means that the aggregate policy will still support the economy in 2026, but will also focus more on structural adjustment, with policy efforts tilting towards domestic - cycle consumption and technology [3]. - Since the pressure to achieve this year's economic growth target is small, there is insufficient motivation for policy intensification this year. Policy efforts are expected to start in the first quarter of next year, and the short - term impetus from policy benefits is insufficient. The stock indices need to consolidate through fluctuations [3]. - At present, the stock indices are still within the fluctuation range. However, as the expectation of policy benefits continues to ferment in the future, the market risk appetite will gradually recover. In general, the stock indices will mainly fluctuate within a range in the short term [3]. - For options, considering the long - term upward trend of the stock indices, a bull spread or ratio spread with a moderately bullish approach can be adopted [3]. 3. Summary by Relevant Catalogs 3.1 Option Indicators - On December 16, 2025, 50ETF fell 0.96% to 3.103; 300ETF (Shanghai Stock Exchange) fell 1.01% to 4.620; 300ETF (Shenzhen Stock Exchange) fell 1.08% to 4.690; the CSI 300 Index fell 1.20% to 4497.55; the CSI 1000 Index fell 1.74% to 7181.62; 500ETF (Shanghai Stock Exchange) fell 1.52% to 7.126; 500ETF (Shenzhen Stock Exchange) fell 1.40% to 2.812; the ChiNext ETF fell 1.92% to 3.060; the Shenzhen 100ETF fell 1.17% to 3.367; the SSE 50 Index fell 1.08% to 2954.79; the STAR 50ETF fell 2.02% to 1.36; and the E Fund STAR 50ETF fell 1.86% to 1.32 [5]. - The trading volume PCR and open - interest PCR of various options changed compared to the previous trading day. For example, the trading volume PCR of SSE 50ETF options was 133.64 (previous day: 109.24), and the open - interest PCR was 90.66 (previous day: 99.95) [6]. - The implied volatility of at - the - money options and the 30 - trading - day historical volatility of the underlying assets of various options are provided. For instance, the implied volatility of at - the - money SSE 50ETF options in December 2025 was 11.63%, and the 30 - trading - day historical volatility of the underlying asset was 10.66% [7]. 3.2 Relevant Charts - The report includes a series of charts for different types of options, such as the trend charts, volatility charts, trading volume PCR charts, open - interest PCR charts, implied volatility curve charts, and at - the - money implied volatility charts for different terms of SSE 50ETF options, SSE 300ETF options, and other options [9][20][33]. These charts visually present the performance and changes of option - related indicators over time.