The S&P 500 soared over the past three years, powering through a bull market, but the momentum has shifted in recent months. Concerns about the war in Iran, the broader economy, and the pace of AI spending have weighed on investors' minds. And as a result, the major benchmark has switched directions time after time, prompting investors to wonder about its next move. And given the recent headwinds, the big question has been the following: Is the stock market about to crash? Let's look to 100 years of hist ...