本論文分析臺灣期貨市場所有投資人的交易資料，探討個別投資人是否能透過日內交易獲利，以及投資人交易績效之持續性。研究結果顯示，臺灣期貨市場之日內交易情形非常熱絡，平均日內交易量占每日總交易量的53%，而個別投資人的日內交易量占總日內交易量的68%。在交易獲利方面，約有8%的個別投資人能夠藉由日內交易獲利，而這些投資人的日內交易量占總市場交易量的60%。在考慮交易成本後，大額交易人仍能獲利；而過去日內交易績效較佳的投資人，仍能持續獲利。過去為市場贏家的投資人，其下一期的交易量會增加；而過去交易績效較差的投資人，其下期的交易量減少。進一步分析日內交易部位的長期報酬之後，結果顯示大額交易人可以透過日內交易累積超額報酬，但是卻不適合長期的投資策略。 This thesis studies the performance of day trades in the Taiwan Futures Exchange (TAIEX) for the period between January 2007 and March 2009. We investigate the influence of past trading activities on subsequent returns from day trading. The results indicate that day trading is prevalent in the TAIEX futures market. Day trading accounts for 53% of total trading activities, of which individual investors account for 68% of the day trading volume. About 8% of the individual investors can profit by day trading; day trading of these investors accounts for 60% of all day trading activities. Heavy day traders can earn gross profits and their sufficient profits can cover transaction costs. There is a positive relation between past profitability and subsequent returns. Day traders who historically earned profits continue to earn profits. Moreover, trading performance will influence subsequent trading activities. Day traders with better performance will increase their day trading activities and traders with poor performance will reduce their day trading activities in subsequent three month period. Finally, we analyze the holding return of day trading. Heavy day traders have poor holding return than occasional day traders. They can accumulate excess profits through day trading, but not long-term holding strategy.
