The S&P 500 Has Fallen in 56% of Septembers Since 1928. Here’s What That Means for Artificial Intelligence (AI) Stocks. – The Globe and Mail / 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. The Globe and Mail