N-UNCOUNT 绿票讹诈（收购方以收购公司为要挟而迫使某公司溢价回购股票）Greenmail is when a company buys enough shares in another company to threaten a takeover and makes a profit if the other company buys back its shares at a higher price. 绿票讹诈（收购方以收购公司为要挟而迫使某公司溢价回购股票） [mainly US, business]
Family control would prevent any hostile takeover or greenmail attempt.