buyback
noun [ C or U ] uk/ˈbaɪ.bæk/ us/ˈbaɪ.bæk/
（尤指股票的）回购
an arrangement in which a business or person sells something, especially shares in companies, and then buys them again according to an agreement
His company have just announced a $1 billion stock buyback. 他的公司刚刚宣布回购了10亿美元的股票。