The S&P 500 Has Fallen in 56% of Septembers Since 1928. Here’s What That Means for Artificial Intelligence (AI) Stocks. – Yahoo Finance / Artificial intelligence (AI) / By hi@aiweekly.co.in The S&P 500 Has Fallen in 56% of Septembers Since 1928. Here’s What That Means for Artificial Intelligence (AI) Stocks. Yahoo Finance