These investor-favorite stocks have been a boon to shareholders, and the future looks bright.The S&P 500 (^GSPC 1.09%) has been squarely in rally mode since the end of 2022, with a number of positive developments fueling its advance. Economic conditions have improved, artificial intelligence (AI) has gone viral, the U.S. election yielded less drama than expected, and the Federal Reserve Bank has already made two interest rate cuts, with more to follow. After gaining 24% last year, the benchmark index is up ...