Athletic wear, fashion and cosmetics have been flying out of e-commerce warehouses since the pandemic began as consumers concentrated on buying for their health and their looks, and from home. This year, several primarily direct-to-consumer online firms featuring these items have launched initial public offerings (IPOs). As both manufacturers and retailers, the brands have surged in popularity and drawn widespread investor interest. The IPOs have had a largely positive reception from market analysts, although there has been some concern these on-trend companies have jumped too quickly and might have to face the consequences of increased restrictions and shareholder scrutiny. These...