The mere mention of October is enough to frighten some investors, while others wonder, "What's the big deal?" Sure, five of the stock market's worst 10 days happened in October but overall, it's a pretty average month for the market.
Instead, the history lessons to turn to this month are about infrequent events such as the U.S. midterm elections or when stocks appear mispriced. Here's what investors will be watching:
About those elections. Investors are already betting on a split Congress, with Democrats possibly taking over the House. If Democrats were to gain control of both the House and Senate, that might rattle the market, said Craig Hodges, chief executive at Hodges Capital Management, which oversees six mutual funds.
Since 1946, the S&P 500 has never declined in the 12 months following midterm elections, Hodges said, citing research he has conducted. What's more, the S&P 500 has seen an average fourth-quarter return of 7.9 percent during midterm election years, he adds.
But don't be surprised if the stock market hits a temporary rough patch before then. "We certainly could see some volatility going into the elections," said Matthew Etter, owner of Signet Financial Management, a registered investment adviser. That would be a departure from a relatively calm market recently.
What to do: While midterm elections could boost the market, there's another important reason for optimism: Economic growth is solid. For Hodges, that further supports being fully invested by November, not keeping cash on the sidelines. "Any dip I would use as a real buying opportunity," he said.
Hunt for value. Remember back in January and February when the market fell 10 percent in a matter of days? The S&P 500 fully recouped those losses by August, and the Dow Jones industrial average did so in September.
What has been good news for your portfolio has some investors feeling squeamish about investing when stock prices are high. But perspective matters, Hodges says, and some stocks look downright cheap. "There are more mispriced stocks in the market than I've ever seen before," he says.