本周热度变化最大行业为商贸零售、交通运输：市场情绪监控周报（20251215-20251219）-20251223

• The report introduces a "Total Heat Index" indicator, which aggregates the browsing, self-selection, and click counts of individual stocks, normalized by their market share on the same day, and then multiplied by 10,000, with a value range of [0,10000][7] - The "Total Heat Index" is used as a proxy variable for "emotional heat" to track the overall market sentiment for broad-based indices, industries, and concepts[7] - The report constructs a simple rotation strategy based on the weekly heat change rate (MA2) of broad-based indices, buying the index with the highest heat change rate at the end of each week, and staying out of the market if the highest change rate belongs to the "others" group[13][15] - The rotation strategy based on the heat change rate (MA2) has an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a return of 31.42% in 2025[16] - The report also constructs two simple portfolios: one selecting the top 10 stocks with the highest total heat from the top 5 concepts with the largest heat change rate, and another selecting the bottom 10 stocks with the lowest total heat from the same concepts[32][33] - The "BOTTOM" portfolio, which selects low-heat stocks from high-heat concepts, has historically achieved an annualized return of 15.71% with a maximum drawdown of 28.89%, and a return of 41% in 2025[34] - The "Total Heat Index" indicator is defined as the sum of browsing, self-selection, and click counts of individual stocks, normalized by their market share on the same day, and then multiplied by 10,000, with a value range of [0,10000][7] - The report calculates the weekly heat change rate (MA2) for different groups of stocks, including broad-based indices, industries, and concepts, and uses this to construct a rotation strategy[13][15] - The rotation strategy involves buying the index with the highest heat change rate at the end of each week, and staying out of the market if the highest change rate belongs to the "others" group[13][15] - The report constructs two simple portfolios: one selecting the top 10 stocks with the highest total heat from the top 5 concepts with the largest heat change rate, and another selecting the bottom 10 stocks with the lowest total heat from the same concepts[32][33] - The rotation strategy based on the heat change rate (MA2) has an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a return of 31.42% in 2025[16] - The "BOTTOM" portfolio, which selects low-heat stocks from high-heat concepts, has historically achieved an annualized return of 15.71% with a maximum drawdown of 28.89%, and a return of 41% in 2025[34]