Retail Euphoria Turns Six-Week Fund Into Record-Busting AI Trade

Brian Emes manages a retail store in Lethbridge, Alberta, a small city on the Canadian prairie about a two-hour drive from the US border. On the morning of May 11, before opening the shop, the 43-year-old launched his brokerage app and bought 55 shares of an exchange-traded fund that hadn’t existed until early April.