Came across this interesting snippet on Market Index
Since 1950, the S&P 500 has been up approximately 1% on average in October, which ranks as the seventh best month of the year. Having said this, it performs quite poorly during election years.
“Uncertainty ahead of Election Day can intensify Octoberphobia into a self-fulfilling prophecy, which can produce heightened volatility and market setbacks October is infamous for,” says AlmanacTrader.