【 Top 20 US Stock Sales: US healthcare giant Cigna will repurchase $10 billion worth of shares 】 US healthcare giant Cigna closed up 16.68% at $2.664 billion. Xinnuo announced on Sunday that it will abandon the acquisition of Humana due to the two companies not being able to reach an agreement on the acquisition price. Xinnuo also announced that it will invest an additional $10 billion to repurchase stocks, bringing its total stock repurchase volume to $11.3 billion.