Shares of IQVIA Holdings Inc. (IQV) plummeted 6.02% in after-hours trading on Monday, following a downgrade by TD Cowen. The sharp decline came after the stock had already underperformed during the regular trading session.

TD Cowen lowered its rating on IQVIA from Buy to Hold, while paradoxically raising its price target from $206 to $215. This unexpected downgrade appears to have sparked a sell-off among investors in extended trading. The move by TD Cowen suggests a more cautious stance on the company's near-term prospects, despite the slightly higher price target.

During the regular trading session, IQVIA's stock had already shown weakness, shedding 1.19% to close at $213.88. This marked the fourth consecutive day of losses for the company, with the stock now trading 5.33% below its 52-week high of $225.91 reached on November 7th. The after-hours plunge, if it holds through the next regular session, would push the stock significantly further from its recent peak.