Over the past three years, stock indexes soared, and the famous S&P 500 delivered a 78% gain, reaching multiple record highs. A lower interest rate environment, as well as optimism about new technologies such as artificial intelligence (AI) and quantum computing, drove investors to pile into these and other growth stocks. Though worries about U.S. tariffs on imports rocked markets last spring, the concerns quickly eased, and indexes went on to gain and finish the year on a positive note. But in recent we ...