S&P 500 index drops 7%, triggering a 15-minute trading halt

Global stock markets and oil prices plunged Monday after a fight among major crude-producing nations jolted investors who already were on edge about the surging costs of a virus outbreak.

The main stock indexes in Britain and Germany were down by almost 7%. Japan’s benchmark closed down 5.1% while Australia’s lost 7.3% and the Shanghai market in China was off 3%.

Trading in Wall Street futures was halted for this first time since the 2016 U.S. presidential election after they fell more than the daily limit of 5%. Bond yields...