Warning lights are flashing in a corner of U.S. debt markets.
Bond investors scrambling to protect themselves from losses are increasingly using bets against the largest junk-bond exchange-traded funds and derivatives that rise in value when corporate bonds lose ground. The popularity of such defensive trades could portend more pain for stock investors as corporate bonds, especially those with sub-investment grade, or junk, ratings, often pick up signs of economic stress before other assets.
The full article is available at https://www.wsj.com/articles/investors-bet-10-billion-against-popular-bond-etfs-11544533200