UBS Chief Economist Arend Kapteyn noted in a research report on Wednesday that with the US midterm elections approaching, this period has historically seen significantly amplified stock market volatility, and this year is unlikely to be an exception. He cited data indicating that September to October have been the most volatile months of the year since 1928. Historical patterns show that in midterm election years, the S&P 500 typically declines from late August to early October, but then sees an average return of 14% by March of the following year. Strategists at JPMorgan Chase and Bank of America also warned that if Democrats sweep both chambers of Congress, the market could experience a significant downturn, posing a particular threat to AI-related assets.