NEW YORK--Stocks that traded heavily or had substantial price changes Thursday: Weibo Corp., down 17 cents to$ 24.51. The Chinese social media company announced a$ 500 million stock buyback plan. Novavax Inc., down$ 1.10 to$ 73.65. The vaccine maker asked European regulators to expand conditional approval of its COVID-19 vaccine to teenagers. Tempur Sealy International Inc., down$ 1.07 to$ 27.92. The mattress maker gave investors a discouraging sales update. Citigroup Inc., down$ 1.57 to$ 53.40.
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2022-03-31 00:00:00.0