Viking Therapeutics stock sinks as Novo’s Wegovy pill debut resets obesity-drug pricing
New York, January 5, 2026, 14:21 EST — Regular session Shares of Viking Therapeutics (VKTX) slid 9.9% to $31.93 in afternoon trading on Monday as obesity-drug stocks reacted to Novo Nordisk’s U.S. launch of a Wegovy weight-loss pill. Novo’s U.S.-listed shares rose 5.1%, while Eli Lilly fell 3.9% and the SPDR S&P Biotech ETF dropped 2.2%. The move highlights how sensitive obesity-drug developers remain to pricing signals from the market leaders. Viking has no approved products, so changes in expected pricing can hit the stock as hard as trial data. Direct-to-consumer discounts are also changing how investors think about margins