政策利好预期升温，股指震荡反弹

Report Industry Investment Rating - Not provided in the given content Core Viewpoints - On December 12, 2025, all stock indices oscillated and rebounded. The total trading volume of the Shanghai, Shenzhen, and Beijing stock markets was 2.12 trillion yuan, an increase of 233.5 billion yuan from the previous day [3]. - The Central Economic Work Conference pointed out that in 2026, China will continue to implement a more proactive fiscal policy and a moderately loose monetary policy. The key tasks for next year are to focus on domestic demand and build a strong domestic market, and to adhere to innovation - driven development and cultivate new growth drivers. Policy benefits in expanding domestic demand and supporting technological innovation will continue and intensify, which will play a positive role in stabilizing total economic demand and promoting structural transformation and upgrading. The risk appetite of the stock market has recovered, driving the stock index to rebound [3]. - External risk factors have eased, and the domestic liquidity environment is relatively loose. In the short term, the risk appetite of the stock market is relatively positive and optimistic. Overall, the expectation of policy benefits is gradually fermenting, and the stock index will be mainly oscillating and strengthening in the short term [3]. - For options, considering the long - term upward trend of the stock index, a bull spread or ratio spread strategy with a moderately bullish view can be adopted [3]. Summary by Relevant Catalogs 1 Option Indicators - ETF and Index Performance: On December 12, 2025, 50ETF rose 0.45% to 3.134; 300ETF (Shanghai Stock Exchange) rose 0.56% to 4.694; 300ETF (Shenzhen Stock Exchange) rose 0.55% to 4.766; the CSI 300 Index rose 0.63% to 4580.95; the CSI 1000 Index rose 0.81% to 7370.94; 500ETF (Shanghai Stock Exchange) rose 1.17% to 7.285; 500ETF (Shenzhen Stock Exchange) rose 1.20% to 2.872; the ChiNext ETF rose 0.89% to 3.174; the Shenzhen 100ETF rose 0.58% to 3.449; the SSE 50 Index rose 0.59% to 2994.64; the STAR 50ETF rose 1.87% to 1.42; and the E Fund STAR 50ETF rose 1.63% to 1.37 [5]. - Volume and Position PCR: The report provides the volume PCR and position PCR of various options on December 12, 2025, and their values on the previous trading day, including 50ETF options, SSE 300ETF options, etc [6]. - Implied Volatility and Historical Volatility: The report presents the implied volatility of at - the - money options in December 2025 and the 30 - trading - day historical volatility of the underlying assets for various options, such as 50ETF options, SSE 300ETF options [7][8]. 2 Relevant Charts - SSE 50ETF Options: The report includes charts of the SSE 50ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [9][10][11]. - SSE 300ETF Options: There are charts of the SSE 300ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [20][21][22]. - SZSE 300ETF Options: Charts cover the SZSE 300ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [32][33][34]. - CSI 300 Index Options: The report shows charts of the CSI 300 index trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [44][45][46]. - CSI 1000 Index Options: There are charts of the CSI 1000 index trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [57][58][59]. - SSE 500ETF Options: Charts include the SSE 500ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [71][72][73]. - SZSE 500ETF Options: The report provides charts of the SZSE 500ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [84][85][86]. - ChiNext ETF Options: There are charts of the ChiNext ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [97][98][99]. - Shenzhen 100ETF Options: The report shows charts of the Shenzhen 100ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [110][111][112]. - SSE 50 Index Options: Charts cover the SSE 50 index trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [123][124][125]. - STAR 50ETF Options: There are charts of the STAR 50ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [136][137][138]. - E Fund STAR 50ETF Options: The report provides charts of the E Fund STAR 50ETF trend, option volatility, volume PCR, position PCR, implied volatility curve, and at - the - money implied volatility of different tenors [145][146][147].