Stocks rebounded in the final weeks of August, putting the S&P 500 just below its all-time high heading into September. But a lot has changed under the surface since July. The Magnificent Seven stocks that once dominated the market have yet to fully recover from recent sell-offs. The year's most popular trade—a long bet on big tech stocks—has faltered as investors have warmed up to dividend payers and other rate-sensitive stocks in anticipation of interest rate cuts by the Federal Reserve. With the Fed all ...