According to CoinMeta, September is usually the month with the worst performance for the stock market, yet three ETF (including iShares, U.S, Large Cap Premium Income Active ETF, Amplify CWP Enhanced Dividend Income ETF, and Janus Henderson AAA CLO ETF) have achieved yields as high as 9% during this period. Since 1928, the S&P 500 index has had an average negative return in September. This year, the VIX index soared to 31, which directly drove up the premiums of option writing income funds.