Your S&P 500 Index Fund Is Actually a Concentrated Tech Bet in Disguise.The Index That Isn’t What It SaysThe S&P 500 was created in 1957 to track the performance of America’s 500 largest companies, offering investors broad exposure to the U.S. economy. But somewhere along the way, it slowly transformed into something else entirely. Today, buying the S&P 500 means making a concentrated bet on just ten companies, with the top three (NVIDIA, Microsoft, and Apple) controlling more market weight than the smalles ...