This is normal.
Equity funds invest almost all their funds in stocks, and the number of stocks invested by a stock fund ranges from a dozen to dozens or even hundreds. Therefore, a stock fund can be regarded as the overall performance of the market. Of course, this statement is very inaccurate, because many funds have specific investment directions and styles.
The so-called market is also an incomplete concept. Many funds invest in small-cap stocks, depending on the CSI 500, or small and medium-sized board, or even the Growth Enterprise Market. Some funds invest in large-cap blue-chip stocks, and it is more appropriate to use CSI 300 for market comparison.
Therefore, it is difficult for stock funds to have the so-called "independent market" because they invest in many stocks, and individual stocks can appear independently of the broader market, but it is difficult for many stocks to form this particularity at the same time.