本周热度变化最大行业为商贸零售、建筑材料：市场情绪监控周报（20251222-20251226）-20251228

• The report introduces a "Total Heat Indicator" for monitoring market sentiment, which aggregates the total heat indicators of individual stocks within broad-based indices, industries, and concepts[7] - The total heat indicator for individual stocks is defined as the sum of browsing, self-selection, and click counts, normalized by the market share on the same day, and then multiplied by 10,000, with a value range of [0,10000][7] - The report constructs a 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 "others" group has the highest change rate[13][16] - 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 36.71% in 2025[16] - The report also constructs two simple portfolios based on concept heat: a "TOP" portfolio consisting of the top 10 stocks with the highest total heat in the hottest concepts, and a "BOTTOM" portfolio consisting of the bottom 10 stocks with the lowest total heat in the hottest concepts[32][33] - The "BOTTOM" portfolio historically achieved an annualized return of 15.71% with a maximum drawdown of 28.89%, and a return of 42.4% in 2025[34] - The heat change rate (MA2) for broad-based indices this week shows that the CSI 500 index has the highest increase of 7.1%, while the CSI 300 index has the largest decrease of 5.08%[2][16] - The heat change rate (MA2) for Shenwan primary industries this week shows that the top five industries with the highest positive change rates are retail, building materials, automotive, basic chemicals, and petroleum and petrochemicals, while the top five industries with the highest negative change rates are banking, coal, media, computer, and electronics[2][27] - The heat change rate (MA2) for Shenwan secondary industries this week shows that the top five industries with the highest positive change rates are environmental equipment II, special steel II, glass fiber, beverage and dairy, and aerospace equipment II[2][27] - The top five concepts with the highest heat change rates this week are sugar substitute, automotive dismantling, civil explosives, Hainan Free Trade Zone, and PVDF concept[2][28]