- The report introduces a "Total Heat Index" for monitoring market sentiment, 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 sentiment of 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 is in the "others" group[13][15] - The rotation strategy based on the heat change rate (MA2) of broad-based indices has an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a return of 8.32% since 2025[16] - The report also constructs two simple portfolios based on the heat change rate of concepts, selecting the top 5 concepts with the highest heat change rate at the end of each week, and forming a "TOP" portfolio with the top 10 stocks by total heat in each concept, and a "BOTTOM" portfolio with the bottom 10 stocks by total heat in each concept[31] - The "BOTTOM" portfolio of high-heat concepts has historically achieved significant excess returns, with an annualized return of 15.71% and a maximum drawdown of 28.89%, and a return of 18% since 2025[33] - The "Total Heat Index" for individual stocks is defined as the sum of browsing, self-selection, and click counts, 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" for broad-based indices is obtained by summing the total heat indices of the constituent stocks of the indices, including CSI 300, CSI 500, CSI 1000, and CSI 2000, as well as an "others" group for stocks not included in these indices[8] - The weekly heat change rate (MA2) for broad-based indices is calculated and used to construct a rotation strategy, 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 is in the "others" group[13][15] - The weekly heat change rate (MA2) for industries is calculated similarly, with the report listing the top 5 industries with the highest positive and negative heat change rates for both primary and secondary industries[20][27] - The weekly heat change rate for concepts is calculated similarly, with the report listing the top 30 concepts with the highest heat change rates[28][30] - Two simple portfolios are constructed based on the heat change rate of concepts, selecting the top 5 concepts with the highest heat change rate at the end of each week, and forming a "TOP" portfolio with the top 10 stocks by total heat in each concept, and a "BOTTOM" portfolio with the bottom 10 stocks by total heat in each concept[31] - The rotation strategy based on the heat change rate (MA2) of broad-based indices has an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a return of 8.32% since 2025[16] - The "BOTTOM" portfolio of high-heat concepts has an annualized return of 15.71% and a maximum drawdown of 28.89%, and a return of 18% since 2025[33]