本周热度变化最大行业为公用事业、传媒：市场情绪监控周报（20260119-20260123）-20260125

• The report introduces a "Total Heat Index" indicator, which is defined as the sum of a stock's browsing, watchlist additions, and click counts, normalized as a percentage of the total market on the same day, and then multiplied by 10,000. The value range of the indicator is [0, 10,000][7] - A rotation strategy is constructed based on the weekly rate of change of the heat index (MA2). At the end of each trading week, the strategy involves buying the broad-based index with the highest MA2 rate of change. If the "Others" group has the highest rate of change, the strategy remains in cash. The strategy has achieved an annualized return of 8.74% since 2017, with a maximum drawdown of 23.5%, and a return of 3.6% in 2026[13][16] - The report also constructs two simple portfolios based on concept heat indices. The first portfolio (TOP) selects the top 10 stocks with the highest total heat index from the top 5 concepts with the highest heat index changes each week, while the second portfolio (BOTTOM) selects the bottom 10 stocks with the lowest total heat index from the same concepts. The BOTTOM portfolio has historically achieved an annualized return of 15.71% with a maximum drawdown of 28.89%[30][32]