許多文獻發現芝加哥選擇權交易所推行的波動率指數(VIX)是股市擇時之重要參考指標,本研究主要目的在驗證VIX指數是否適合作為台灣與中國大陸股票市場之「擇時指標」。然而,本研究發現依照過去文獻所建議的指標方式,其投資績效並不佳,這可能與過去文獻並未考量股價指數具有「急跌緩漲」之現象有關。為了使VIX指數更具擇時效果以及提高投資績效,故相對於過去文獻,本研究增加考慮「急跌緩漲」之特性並納入擇時準則之衡量。本研究有以下之重要發現:以CBOE所編製之VIX指數作為投資股票市場之擇時指標,在台灣與中國大陸市場而言是成功的,特別是以兩個市場開放QFII後的成功率來看,其成功率分別為95.83%與78.57%,平均成功率為89.47%;且兩個市場開放QFII後之每次投資機會的平均報酬率,台灣市場與大陸市場分別為32.49%與21.24%,兩個市場的平均報酬率為28.35%,即平均年報酬率為27.13%。本研究的重要投資意涵如下:以台灣與中國大陸市場的實證結果而言,CBOE所編製之VIX指數可以作為投資股票市場之擇時指標,特別是在開放QFII之後,其成功率較高。
Past literatures revealed that volatility index (VIX) of Chicago Board Options Exchange (CBOE) is an important market timing indicator. In this paper, we focus on the Taiwan and China market and investigate whether VIX index can be used as an indicator of market timing in these two markets. In contrast to the past literatures, we took "slow rise and quick fall" into consideration when researching the credibility of VIX index. The empirical results show that VIX index can be utilized as a market timing indicator in Taiwan and China market. The VIX index has a significant contribution in the investment performance, especially when after these two markets launched the qualified foreign institutional investors (QFII) scheme, the average success rate of our investment strategy is 89.47%, and the average return is 28.35%.