Duality Biotherapeutics (HKG:9606) said it was due to join the Hang Seng Index on Monday, Sept. 8, according to a Hong Kong bourse filing Sunday.
Shares of the biopharmaceutical firm gained nearly 11% in morning trade Monday.
The company's stock would also be eligible for inclusion to the southbound trading link of the Shanghai bourse's Shanghai-Hong Kong Stock Connect the same day.