1, because the stocks in the fund's heavy positions are generally large-cap stocks and lack extensive funds. Without a large amount of speculative funds, the fund needs to control risks, and it is impossible to significantly increase its holdings of heavy stocks.

2, it is not too difficult to pull up sharply, but it is impossible to complete the shipment at the same time when pulling up sharply. A sharp rise will increase the cost of holding shares and make it difficult to make a profit. Therefore, it is difficult for stocks with heavy positions in the fund to rise.