市场迎来风格切换，量化策略超额收益还能保持吗？

Market Overview - In March 2025, the equity market entered a correction phase, while the commodity market continued to experience fluctuations. Early March saw a continuation of optimistic risk appetite, but by mid-March, the market became more cautious due to earnings season and various disturbances following Trump's administration, leading to a market decline. The market style shifted from small-cap growth to large-cap value, with trading focus diversifying towards sectors like non-ferrous metals, consumer services, and defense [3][14]. Equity Market Performance - The public quantitative strategy performance showed varied results across different indices. For the CSI 300 index, the monthly return was -0.07%, with strict constraint strategies yielding an excess return of 0.57%, SmartBeta strategies at 0.85%, and rotation strategies at 0.70%. The CSI 500 index had a monthly return of -0.04%, with excess returns of 1.39% for strict constraint strategies, 1.82% for SmartBeta, and 1.64% for rotation strategies. The CSI 1000 index saw a monthly return of -0.70%, with excess returns of 1.58%, 2.02%, and 2.45% for the respective strategies [4][17][25]. Private Fund Strategy Performance - In March 2025, the best-performing private fund strategy was the CSI 1000 index strategy with an annualized return of 26.20%. The quantitative stock selection strategy followed with a return of 20.50%, while the CSI 500 index strategy achieved 16.24%. The CSI 300 index strategy lagged with a return of only 0.17%. In the relative value strategy, the convertible bond strategy performed well with a return of 22.67%, while the market-neutral strategy returned 10.22% and the ETF arbitrage strategy returned 3.66%. In the managed futures strategy, the options arbitrage strategy led with a return of 9.31% [5][29][32]. Market Environment Factors - The equity market in March experienced a style shift towards large-cap value, which increased the difficulty for quantitative strategies to achieve excess returns. The volatility in value-growth styles also heightened market instability, impacting the performance of quantitative strategies. Despite a decrease in market volatility and turnover rate, trading volume remained within a "comfortable zone" for quantitative strategies, suggesting a lower likelihood of significant declines in excess returns in the short term [6][30][34]. Commodity Market Analysis - The commodity market in March showed mixed performance influenced by overseas disturbances. The energy sector saw oil prices rise due to new production cuts from OPEC+ and increased sanctions on Iran and Venezuela. Conversely, the black metal prices declined due to unmet domestic demand. Gold prices surged significantly as a safe-haven asset amid uncertainties regarding international trade and economic outlooks [14][36]. Conclusion - Overall, the report indicates a complex market environment with shifting styles and varied performance across different strategies. The quantitative strategies face challenges due to increased volatility and changing market dynamics, while certain sectors within the commodity market present potential opportunities for investors [30][34][36].