Dow suffers worst day since October The Dow Jones Industrial Average had its worst day since October 2020. It's unclear what impact economic jitters will have on San Diego's ongoing recovery. and last updated 2021-07-19 20:39:04-04 The Dow Jones Industrial Average dropped 725 points Monday amid economic jitters over the Delta Variant. The Dow is still up 3,738 points since Jan. 4, even after its worst day since October. "Hopefully, if it does slow (the economy) down, it's a small amount, it's more of a pumping of the breaks, than a slamming on of the breaks," said Dennis Brewster, a San Diego financial advisor. "That's probably what it would be. But the last thing these companies would want to go through is getting burned again."