Why can the Shanghai Composite Index rise from around 2600 points to about 4000 points despite the daily harvesting of retail investors by quant trading? On one hand, retail investors prefer to buy small and mid-cap stocks rather than heavyweight stocks. Quant trading takes these retail investors as opponents and harvests them through high-frequency trading and precise targeting of retail stop-loss points, but it cannot influence market trends. On the other hand, quant trading currently accounts for about 20%-30% of the trading volume in A-shares, which is not enough to dominate the index trend. This year's market is mainly influenced by loose monetary policy, fiscal stimulus policies, and other factors. With patience capital like social security funds and pension funds heavily investing in financial and energy sector stocks, the index has risen. If you want to avoid being harvested by quant trading and still achieve returns in line with the market, you can only buy index funds!