Wall Street’s broadening trade pressures index-tracking billions

Such a broadening in the winners’ list has been sought for years by market skeptics lamenting an equity melt-up whose momentum has been generated by a tiny cohort of asset-light firms. But it’s a less obvious blessing in the short term for passively managed investors. They’ve stashed one in every four ETF dollars in just five funds — products that are now perilously exposed to the fate of the Magnificent 7.