UnitedHealth (UNH) stock posts largest Dow 30 sell-off since 1998

Core Insights - UnitedHealth Group (NYSE: UNH) is experiencing a significant sell-off, with shares dropping over 55% in the past month, marking one of the steepest declines in modern stock market history [1][2] - This decline is the first instance since 1998 where a Dow 30 component has lost more than half its market value in just one month, with the last occurrence also involving UnitedHealth [2] - The daily Relative Strength Index (RSI) for UNH has fallen to 11, indicating an extreme oversold condition and the most aggressive bearish sentiment in nearly three decades [3] Company Developments - The sell-off accelerated following the suspension of UnitedHealth's 2025 guidance and the resignation of CEO Andrew Witty on May 13, coinciding with reports of a U.S. Department of Justice criminal probe into potential Medicare fraud related to the company's Medicare Advantage operations [4] - The combination of executive instability and regulatory scrutiny has significantly shaken investor confidence [4] Stock Performance - As of Thursday's close, UNH shares fell to $274.35, down 10.93% for the day, and have lost $310.69 per share over the past month, representing a total decline of 53.11% [6] - Investors are closely monitoring whether this historic collapse indicates a long-term breakdown or a potential contrarian buying opportunity, with outcomes dependent on the DOJ investigation, upcoming earnings revisions, and leadership changes following Witty's exit [6]