A50, suddenly! The three major indexes adjusted across the board, what happened?

On December 31st, on the last trading day of 2024, the A50 index, which rose in the morning, plunged at the end of the session. At the same time, there were also signs of loosening chips in the class A share market. It is worth mentioning that after 2:30, there were obvious signs of large funds entering the market to protect the market. So, what happened? First of all, in the past few months, the theme has undergone repeated hype, and this theme has also been cooling down in the near future with the changes in the market ecology; secondly, the rise of this round of dividend assets has also been reduced to low-valued banks and some stocks in a few stable dividend sectors such as petroleum, petrochemical, and transportation; thirdly, it is now the end of the year, and the Spring Festival is just around the corner, so there is a certain demand for funds. Coupled with the upcoming Trump presidency, this has also disturbed market sentiment. More notably, there have been obvious signs of bullish weakness in peripheral markets recently.