UBS warns: US midterm elections may cause severe market volatility, current period is the "calm before the storm"
The chief economist at UBS has issued a warning that September to October has been the most volatile period of the year since 1928, with the effect especially pronounced during midterm election years. The betting odds for Senate control are close to fifty-fifty. Historical data shows that the S&P 500 typically declines before the elections, but posts an average return of about 14% by the following March.
华尔街见闻•2026-09-17 03:51