市场情绪监控周报（20250804-20250808）：本周热度变化最大行业为国防军工、传媒-20250810

• The report introduces a "Total Heat Index" as a proxy for market sentiment, which aggregates the browsing, watchlist, and click counts of individual stocks, normalized as a percentage of the total market activity and scaled by 10,000, with a range of [0,10000][7] - A "Broad-based Index Rotation Strategy" is constructed based on the weekly moving average (MA2) of the heat index change rate. The strategy involves buying the broad-based index with the highest MA2 heat change rate at the end of each week, or staying in cash if the "Other" group has the highest rate. The strategy achieved an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a 2025 YTD return of 20.95%[12][15] - A "Concept Heat Strategy" is developed by selecting the top 5 concepts with the highest weekly heat change rates. Two portfolios are constructed: the "TOP" portfolio, which holds the top 10 stocks with the highest heat within these concepts, and the "BOTTOM" portfolio, which holds the bottom 10 stocks with the lowest heat. The BOTTOM portfolio historically achieved an annualized return of 15.71%, with a maximum drawdown of 28.89%, and a 2025 YTD return of 29%[29][31] - The heat change rate for the CSI 2000 index increased by 5.98% this week, making it the highest among broad-based indices, while the CSI 300 index saw the largest decrease, dropping by 14.81%[15] - Among Shenwan Level-1 industries, the "Defense and Military" sector experienced the highest positive heat change rate (43.6%), while the "Coal" sector had the largest negative change (-36.2%). The top 5 positively changing industries were Defense and Military, Media, Electronics, Pharmaceuticals, and Textiles[26] - The top 5 concepts with the highest heat change rates this week were "China Shipbuilding," "Brain-Computer Interface," "Hyperbaric Oxygen Chamber," "PEEK Materials," and "Smart Light Poles"[27][29]