私募股權為近年企業籌資的新管道，企業私募事先不須向主管機關申請核准，可因此縮短資金取得的時間，並且對於私募對象選擇有更大的空間與主導權；參與私募的認購人則可一次購足大額股份而不會衝擊股價，看似雙贏的籌資方式，對於無法參與認購的小股東而言，私募股權究是可以提昇公司價值，抑或導致股東財富減損，則有待探討。 研究樣本包含上市櫃公司於2002年至2006年募集完成的143個私募股權，採用市場模型事件研究法以及多元回歸，探討私募的異常報酬與折溢價，研究發現如下: 1不同於以往研究多以股東會為事件日，本文採私募宣告見報日或董事會決議日為事件日，發現該私募宣告即已對股價造成衝擊，為股東財富帶來正面且顯著的影響。 2.私募宣告可以為股東帶來短期的財富效果。 3.董事會決議日或見報日前即存在顯著異常報酬，表示可能有消息外露之虞。 4.當發行公司的私募規模越大、內部人持股比越高以及Tobin Q越高時，私募宣告的異常報酬越大；當期市值與帳面值越低或私募前股較表現不佳的公司，私募宣告的異常報酬越大。 5.私募的發行價格主要與私募金額與市值比、ROA、內部人持股比以及是否有投資機會顯著正相關;而與私募股份比以及股價表現顯著負相關。 Private equity placement is an alternative instrument with lower regulatory and flexible issuing covenant. It seems that both issuer and informed investors can benefit from private placement. However, what’s the impact on small shareholders who are not able to participate? We collect 143 samples during 2002/1/1 to 2006/12/31, by market model event study and multivariable regression, to study the abnormal returns and selling price around private equity placement. Our findings are as below: 1. Private placement can bring positive shareholders’ gains. 2. Different to former studies defined their event date as the date of shareholder meeting; in our study we define event date as announcement date of private equity placement. Our evidence shows that shares price were reacted upon announcement on the date of directors meeting or press released. 3. There might have information leakage prior to announcement. 4. Abnormal returns are significant positive related to placement scale, insider holding, and Tobin Q; but significant negative related to market value to book value, and stock performance. It implies that investor might gain from the placements with high proceed to market value, fraction, and Tobin Q. 5. Selling prices are significant positive related to placement proceeds to market value, ROA, insider holdings, and repayment; but significant negative related to fraction placed, corporate governance, and stock returns.
