Top 10 Large-Cap Stocks That Lost the Most Value Last Week (June 30-July 4)

Large-cap stocks that were the worst performers last week include Centene Corporation, which fell 37.82% after withdrawing its 2025 guidance, and Molina Healthcare, which declined 17.69% amid a broader selloff in health insurance stocks. Other stocks that lost significant value include Circle Internet Group, Tempus AI, AST SpaceMobile, AeroVironment, Antero Resources, Korea Electric Power Corporation, Expand Energy Corporation, and Li Auto, which decreased 7.37% after reporting a 24.1% year-over-year drop in June deliveries.

Large-cap stocks experienced significant volatility last week, with notable declines in health insurance stocks. Centene Corporation (CNC) and Molina Healthcare (MOH) were among the worst performers, with CNC falling 37.82% and MOH declining 17.69% [2].

Centene Corporation, a leading healthcare enterprise, saw a 40% drop in its stock price after withdrawing its 2025 guidance. This decision was prompted by preliminary data from an independent actuary, Wakely, which indicated slower market growth and higher morbidity in key states [1]. The company's initial analysis suggested a reduction in its net risk adjustment revenue transfer expectation by an estimated $1.8 billion, leading to a corresponding adjusted diluted EPS impact of approximately $2.75. As a result, investors reacted strongly, causing the stock price to plummet [1].

Molina Healthcare, on the other hand, reduced its FY25 EPS guidance to $21.50-$22.50 from the previous $24.50, aligning with industry challenges and the broader selloff in health insurance stocks [2]. The company cited rising medical costs and higher morbidity in Medicaid, Medicare, and Marketplace segments as the primary drivers for the guidance reduction. Despite the significant decline in stock price, MOH shares traded higher, indicating that the market had anticipated a more severe cut [2].

Other notable losses included Circle Internet Group, Tempus AI, AST SpaceMobile, AeroVironment, Antero Resources, Korea Electric Power Corporation, Expand Energy Corporation, and Li Auto, which decreased 7.37% after reporting a 24.1% year-over-year drop in June deliveries [3].

References:
[1] https://www.morningstar.com/news/pr-newswire/20250707sf24645/centene-corporation-cnc-investors-see-over-11-billion-of-shareholder-value-wiped-out-in-1-day-amid-independent-actuary-data-withdrawn-2025-guidance-hagens-berman
[2] https://www.gurufocus.com/news/2961637/molina-healthcare-lowers-fy25-eps-outlook-amid-industry-challenges
[3] https://finance.yahoo.com/news/li-auto-june-deliveries-decline-100257272.html