U.S. stocks were lower, with the Dow Jones index falling more than 700 points on Monday.

Shares of Cytek Biosciences, Inc. (NASDAQ:CTKB) rose sharply during Monday's session.

Cytek Biosciences announced a $50 million stock buyback program for 2025.

Cytek Biosciences shares jumped 6.1% to $6.78 on Monday.

Here are some other big stocks recording gains in today's session.

• Akso Health Group (NASDAQ:AHG) shares jumped 61.5% to $1.8498.
• Mesoblast Limited (NASDAQ:MESO) shares gained 17.7% to $20.64.
• Mercurity Fintech Holding Inc. (NYSE:MFH) rose 16.2% to $7.88.
• VNET Group, Inc. (NASDAQ:VNET) gained 14% to $4.8700.
• Emergent BioSolutions Inc. (NYSE:EBS) shares jumped 10.8% to $9.16. HC Wainwright & Co. analyst Raghuram Selvaraju initiated coverage on Emergent BioSolutions with a Buy rating and announced a price target of $15.
• Microvast Holdings, Inc. (NASDAQ:MVST) shares rose 10.6% to $2.7101.
• Hesai Group (NASDAQ:HSAI) gained 10.5% to $14.95. Hesai Technology said it delivered more than 100,000 Lidar units during December.
• Radiopharm Theranostics Limited (NASDAQ:RADX) rose 7.9% to $5.04. Radiopharm reported a strategic co-development partnership with Lantheus for Australia.
• VEON Ltd. (NASDAQ:VEON) gained 5.5% to $41.11. VEON and Starlink partnered to launch direct-to-cell satellite connectivity for Kyivstar customers in Ukraine.
• Coincheck Group N.V. (NASDAQ:CNCK) shares rose 5.2% to $8.94.
• Antero Resources Corporation (NYSE:AR) shares gained 4.8% to $34.91.
• Forward Air Corporation (NASDAQ:FWRD) rose 3.2% to $31.09.

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