Core Insights - Molina Healthcare's shares dropped nearly 20% in premarket trading due to a reduction in its full-year profit forecast, attributed to rising medical costs in its government programs [1] Company Summary - Molina Healthcare has once again lowered its profit forecast for the full year, indicating ongoing challenges in managing medical costs [1] - The significant decline in share price reflects investor concerns over the company's financial outlook and operational efficiency in the current healthcare environment [1]