從民國五十年台灣股市成立以來，企業所發行的股票價格時常受到非本身營運因素(如兩岸之間的危機談話、國際戰爭、或者股票投機客..等等)所干擾，導致股票價格有如暴漲暴跌一樣的漲跌，當這些因素所干擾完後，最終還是回歸於公司基本面分析，若找出財務面健全的公司，可以買進並持久，而不隨著非本身營運因素所影響，相信與在自己股票投資獲利上，會有較好的成績。
本研究主要是以財務指標來針對目前台灣的上市公司來做檢測，先找出防禦型條件的企業，然後找出較會影響對這些優良公司營運的財務指標，最後研究以這些財務指標去預測公司近期的股票價格，而此為本研究的最終目的。
挑選出防禦型條件的公司，是利用Graham與Buffett學者所提出的方法來挑選出這些公司，再來是使用統計之相關係數方法找出較為影響公司的財務指標，故希望由相關係數的方法來找出前二十個與股價最有相關的財務指標，最後是以倒傳遞類神經方法用找出這些財務指標來預測公司的股票價格，在倒傳遞類神經方法具有不錯的預測的功能，可以使用其財務指標來預測出公司近期的股票價格，來提供這些資訊來支援投資人投資股票的決策，以獲得更好的獲利。

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