【金融工程】市场维持震荡，风格轮动提速——市场环境因子跟踪周报（2025.11.13）

Market Overview - The market is expected to continue fluctuating around the 4000-point mark of the Shanghai Composite Index, with a notable acceleration in style and sector rotation [2][5] - The recommendation is to adopt a cautious approach, focusing on opportunities in technology, new energy, and electricity sectors during the fluctuations [2][5] Stock Market Factors - The market style has shifted towards small-cap stocks, with a preference for value over growth [7] - The volatility of both small-cap and value-growth styles has decreased [7] - There has been an increase in the dispersion of excess returns across industries, along with a rise in the speed of sector rotation and the proportion of rising constituent stocks [7] Market Activity - Market volatility and turnover rates have both declined [8] Commodity Market Factors - The trend strength in the agricultural products sector has decreased, while other sectors have shown little change [19] - Basis momentum has increased across all sectors, with a decline in volatility for all but the agricultural products sector [19] - Liquidity has decreased across all sectors [19] Options Market - Implied volatility levels for the SSE 50 and CSI 1000 have gradually decreased, while the ratio of put to call option open interest has increased [22] - There is a notable increase in the skew of both put and call options for the SSE 50, indicating uncertainty in market direction and dominant style [22] Convertible Bond Market - The convertible bond market has performed well, with a continued upward trend [24] - The premium rate for bonds convertible at 100 yuan has significantly increased, nearing the 90th percentile of the past year [24] - The proportion of low premium convertible bonds has remained stable, with weekly trading volume showing a continuous recovery [24]