贵金属行情火热，权益等待春季行情——市场环境因子跟踪周报（2025.12.19）

Market Overview - A-shares remain stable with controllable risks, suggesting opportunities for low-cost investments in high-prosperity sectors. The macro strategy team indicates that market enthusiasm for chasing high prices is still weak, but the index remains relatively stable, expected to maintain a fluctuating structure with controllable risks. Signs of market stabilization have become more apparent since December, particularly in high-prosperity sectors that have shown resilience. It is recommended to preferentially invest in industries with upward trends in prosperity and patiently await the upcoming spring market [1][4][6]. Stock Market Factors - Last week, market style shifted slightly towards large-cap stocks, with a value-oriented approach gaining traction compared to the previous week. The volatility of both large-cap and value-growth styles remained low. The dispersion of excess returns among industries and the speed of industry rotation have reversed, showing an increase, while the proportion of rising constituent stocks has decreased. The trading concentration of the top 100 stocks remained stable, with a slight decline in the trading concentration of the top five industries [6][8]. Commodity Market Factors - In the commodity market, all sectors except for the black metal sector showed an upward trend in strength. The efficiency coefficients for precious metals, non-ferrous metals, and agricultural products remained high. The basis momentum for precious metals saw a significant decline, while the basis momentum for energy and black metal sectors increased. Volatility increased in all sectors except for precious metals and agricultural products, and liquidity decreased in the energy and agricultural sectors, while other sectors saw a slight increase [20][21]. Options Market Factors - The implied volatility of the Shanghai Stock Exchange 50 and the CSI 1000 rebounded from low levels last week. In terms of volatility skew, both call and put options for the Shanghai index decreased, while the put option skew for the CSI 1000 continued to rise, indicating that the market has experienced some risk release, with small-cap styles still accumulating risks [29]. Convertible Bond Market Factors - The convertible bond market stabilized and showed signs of recovery last week. The valuation of bonds reached a new high for the year in terms of the premium rate for conversion at 100 yuan, maintaining a trend of oscillation and increase. The pure bond premium rate for debt-type groupings saw a slight increase, while the proportion of low premium conversion bonds continued to decline, remaining at a low level. Market transaction volume rebounded, surpassing the historical median for the past year [31].