The Dow Jones Industrial Average clipped a fresh record at 52,500 on Wednesday, completing a round trip from April's selloff to all-time highs in just over two months. But the index doing the celebrating isn't quite the same one that started the quarter. Alphabet's June 29 promotion into the Dow — swapping out sub-$50 Verizon for a ~$350 AI heavyweight — means five of the Magnificent Seven now sit inside a benchmark once built on railroads and...