本研究以在紐約證券交易所掛牌上市的美國存託憑證(American Depository Receipts；ADR)為研究樣本，運用隨機折現因子(Stochastic Discount Factor；SDF)，檢測台灣、香港、大陸股市與美國股市間的整合程度與發展趨勢。實證研究顯示，在研究樣本期間內，香港股市與美國股市的整合程度最佳，整合程度僅受總體股市股重挫的影響，且整合程度穩定性較高；台灣股市與美國股市整合程度，則隨時間進展，有逐漸改善整合趨勢；相較與台灣香港，大陸股市與美國股市整合程度最差，顯示兩市場間尚未整合。 / This paper discusses the application of the stochastic discount factor model to analyze the financial market integration between Taiwan, Hong Kong, China and U.S. stock markets, and to find out their integration trends in the long term. It also discusses the stability of financial market integration by σ- convergence and factors that cause the difference in stochastic discount factors. The empirical results show that the financial market integration between Hong Kong and U.S. stock market is the best among the three, and the degree of integration is influenced mainly by macroeconomic shocks. On the other hand, the degree of integration between Taiwan and U.S. stock market deteriorate temporarily due to FX rate changes and the issue of new ADR, but it is getting better as time goes by. The integration between China and U.S. stock market is the worst among three, these two markets are basically not integrated yet.