市场情绪监控周报（20250908-20250912）：本周热度变化最大行业为电力设备、房地产-20250914

• The report introduces a "Total Heat Indicator" to monitor market sentiment, defined as the sum of browsing, self-selection, and click counts for individual stocks, normalized by their market share on the same day, and multiplied by 10,000, with a range of [0,10000][7] - A simple rotation strategy is constructed based on weekly heat change rates (MA2), where the highest heat change rate group is selected for investment at the end of each week, and if the "Other" group has the highest rate, the portfolio remains empty[12][15] - The rotation strategy achieves an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a return of 32.7% in 2025[15] - A concept-based strategy is developed by selecting the top 5 concepts with the highest heat change rates weekly, forming two portfolios: "TOP" (top 10 stocks with the highest heat within each concept) and "BOTTOM" (bottom 10 stocks with the lowest heat within each concept)[30] - The "BOTTOM" portfolio historically delivers an annualized return of 15.71%, with a maximum drawdown of 28.89%, and a return of 44.2% in 2025[32]