风险提示。 市场系统性风险、海外市场波动风险、模型误设风险。 报告导读： 从技术面来看，情绪模型信号发出做多信号，A股市场或将开启新的一轮上 行。因此，我们认为，市场有望重回上行趋势。 下周（20251229-20251231，后文同）市场观点：市场有望重回上行趋势。 从量化指标上看，基于沪深300指数的流动性冲击指标周五为0.34，低于前一周 （0.41），意味着当前市场的流动性高于过去一年平均水平0.34倍标准差。上证50ETF期权成交量的PUT-CALL比率震荡上升，周五为0.88，高于前一周 （0.83），投资者对上证50ETF短期走势谨慎程度上升。上证综指和Wind全A五日平均换手率分别为1.06%和1.66%，处于2005年以来的69.45%和75.13%分位 点，交易活跃度有所上升。从宏观因子上看，上周人民币汇率震荡，在岸和离岸汇率周涨幅分别为0.46%、0.42%。日历效应上，2005年以来，上证综指、沪 深300、中证500、创业板指在12月下半月上涨概率分别为50%、55%、45%、40%，涨幅均值分别为1.2%、1.08%、-0.11%、-0.84%，涨幅中位数分别 为-0.07%、0. ...

Core Viewpoint - The article discusses the development of a sentiment timing model based on the analysis of limit-up stocks, "board strategies," and the profit effect, which successfully predicts short-term market sentiment changes [1]. Group 1: Sentiment Timing Model Construction - The annualized return of the sentiment timing model portfolio is 6.65% with a volatility of 15.37% and a maximum drawdown of 29.39% [2]. - The model also performs well when applied to broad indices such as the CSI 300 [2]. Group 2: Improvements to the Model - Improvement 1: By incorporating market trend judgments, the annualized return of the sentiment timing model portfolio increases to 9.41%, with a volatility of 17.98% and a maximum drawdown of 46.35% [3]. - Improvement 2: After applying factor weighting to different sentiment indicators, the annualized return reaches 9.68%, with a reduced volatility of 13.31% and a maximum drawdown of 24.47% [4].