Dow drops 400 points after US-Iran military strikes. Crude oil reaching a new all-time high by December 31 at 12% YES.

Stock Market Today: The Dow Jones index drops while oil prices jump Monday after the U.S. and Iran exchange new strikes.

New U.S. strikes on Iran sent Brent crude above $90 as the six-month war continues to disrupt the Strait of Hormuz.