UnitedHealth Group Inc. ($UNH) significantly impacted the Dow Jones Industrial Average (DJIA) on October 15, 2024, following the release of its earnings report. The company's shares dropped by 9% at the market open, marking its steepest decline since June 2023. This downturn resulted in a loss of approximately 360 points from the DJIA, with the stock alone accounting for 310 points of the index's decline. Analysts attributed the drop to concerns regarding rising medical costs, leading to the DJIA experiencing its worst day since March 2020.