當兩檔股票價格漲跌趨勢相關時,則存在進行配對交易之機會。在價格分歧時買入低估股票、賣出高估股票,並且在價格回到歷史差距時回補部位即可獲利。 本研究分析2005年至2013間台灣寶來卓越五十基金組成股之股價日資料,以最小距離法和兩股價差反轉於零之次數尋找走勢相似之配對進行交易。因應寶來卓越五十基金每季更動組成股,將交易期間定為三個月交易起始,另將門檻值訂為歷史價格差之兩倍標準差。 研究結果顯示未計交易成本之平均年報酬率為0.0501、計入交易成本之平均年報酬率為-0.2667,計入交易成本之平均年報酬率顯著小於零,並將此報酬率和同期五大銀行定存利率、大盤指數以及模擬Naive策略之報酬相比,研究結果發現,研究期間中配對交易計入交易成本後之年化報酬率顯著小於五大銀行定存利率、大盤指數報酬。
Pairs trading strategy makes a profit by building a short position on overvalued stock and a long position on the undervalued one when they diverge and closing the position when they converge to the mean. In this study, stocks are choosen by minimum distance and mean reversion in historical normalized price space from P-shares Taiwan Top 50 ETF over the period 2005 to 2013.The trade period was chosen as 3 months because P-shares Taiwan Top 50 ETF update its composition very season .Open positions on two-standard deviation spread. The average return without transaction costs is 0.0501 and the average return with transaction costs is -0.2667 between 2005 and 2013. The results indicate that the average return with transaction costs is negative and the trading profits with transaction costs are lower than risk-free interest rate and the stock market return for the same time period. The conclusion of this paper is that pairs trading strategy wasn’t a profitable strategy at Taiwan’s stock market in study period.