表1:信号的弱化:回购项目的种类及比例 年份公开市场私人要约回购固定价格式荷兰式拍卖1980100%0%0%0%198169%0%31%0%198273%0%27%0%198363%0%37%0%198459%0%41%0%198545%11%40%3%198662%14%17%7%1987%82%7%8%3%198868%6%9%17%198984%6%3%7%199078%9%8%5%199176%17%4%4%199287%4%3%5%199390%4%2%5%199492%2%5%1%199583%16%1%1%199691%6%2%2%199788%7%2%3%199895%2%2%1%199994%2%1%3%200088%1%9%2%200195%3%1%0%200293%5%1%1%200394%3%2%2%200495%2%1%2%200593%3%1%3%总计88%5%4%3% 数据来源:Gustavo Grullon and David L. lkenberry,“What Do We Know About Stock Repurchases”?Journal of Applied Co.2000,Securities Data Corporation,and LMCM estimates.