Shares of Chinese discounter Vipshop Holdings fell after the company reported earnings. The company reported net revenue of $1.89 billion, a 41 percent year-over-year increase, as active users and orders both increased. The company has 20 million active customers, said CEO Eric Shen, in a statement.
"After several quarters of fine-tuning our strategy of balancing revenue growth and marketing and promotion expenses, we now have improved control between these competing levers and aim to achieve more stabilized growth going forward," Shen said.
Shares of Regeneron dipped as Centers for Medicare and Medicaid Services officials debate changes to the Part B drug payment plan. A Tuesday hearing proceeded amid backlash to the proposed changes. Certain modifications of the proposal could have upside for Regeneron, says Geoffrey Porges, an analyst at Leerink.
— CNBC's Fred Imbert contributed to this report.