Group 1 - The ETF market showed mixed performance, with the China Securities 2000 ETF (159533) leading gains at 8.81% [1] - Zhangjiang ETF (517850) increased by 3.31%, while the CSI 300 ESG ETF from Southern (560180) rose by 2.49% [1] - The ChiNext AI ETF from Southern (159382) was the biggest loser, declining by 2.85%, followed by the S&P Oil & Gas ETF (159518) which fell by 2.75% and another S&P Oil & Gas ETF (513350) down by 2.63% [1] Group 2 - The article suggests that investors should consider buying index ETFs to capitalize on market rebounds [1]