追蹤股係資產重組方式的一種，近年來在美國的證券市場增加許多的發行案例，追蹤股是針對多角化企業特定部門發行不同權利義務的普通股，表彰該特定企業的營運績效，提供給投資人更明確的投資評價，進而提升企業整體的價值。追蹤股的起源係於1984年General Motors在取得Ross Perot’s Electronic Data System後發行首創的追蹤股，雖然陸續有發行之個案，但追蹤股的發行熱潮主要集中於1998年至2000年，包括AT&T、Sprint Corp、Quantum Corp.及Disney等企業，且部分發行企業發行一種以上的追蹤股，因追蹤股可依發行企業的需求制定不同的投票權、轉換權、股利分配政策等，提供給投資者相當多的選擇，顯示追蹤股對企業的籌資或購併提供了新的工具。

由於追蹤股的發行案例較其他資產重組的方式(資產分拆及權益分割)相對較少，因此國外探討此專題的文獻亦不多見，國內目前亦無相關研究。故本研究的主要內容包括資產重組方式的分析及可能的考量因素，並說明追蹤股的起源、特性及優缺點，進而探討追蹤股發行時的宣告效果，觀察其累計異常報酬的顯著性，且驗證累計異常報酬與發行企業市值及市價淨值比的關係。

為提供國內研究者更清楚的了解追蹤股發行全貌，本研究將1998年在美國證券市場發行的Sprint Corp的個案，針對發行的目的、發行架構、該普通股的權利義務及可能的風險等項目加以分析研究。最後以模擬國內上市公司—中華電信發行追蹤股的可行性，提供國內主管機關作為未來研究新金融商品的建議及參考。

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