Regeneron stock sinks after cancer trial miss prompts selloff
Regeneron Pharmaceuticals shares fell 9.8% to $629.68 Monday after its late-stage melanoma drug trial with fianlimab failed to meet the main goal. The study did not show a statistically significant benefit over Merck’s Keytruda. At least 10 brokerages cut price targets. The decline outpaced broader market losses, with the Nasdaq down 0.5%.