本研究致力於探討美國聯準會(FED)實施量化寬鬆政策(QE)與否，商業銀行資產負債表對於股價的影響。本文藉由總經指標(工業生產指數、製造業採購經理人指數)、利差變數(公司債利差、10年期公司債利差)，以及資產負債表變數(存款、貸款等)，對商業銀行股價進行解釋。並透過量化寬鬆政策(QE)的虛擬變數，了解該政策對股價的影響，以及實施該政策是否能夠改善資產負債表變數的顯著程度和影響方向。方法上，本文採用迴歸分析的方式進行實證分析。首先，研究以總經指標以及利差變數對股價進行解釋，且期間限定為量化寬鬆政策期間，藉此確認這兩類變數對股價的影響。後續則以加入資產負債表變數、量化寬鬆(QE)虛擬變數等，並將期間延伸至15年，以進一步釐清實施量化寬鬆(QE)政策的影響。本文實證結果顯示，美國量化寬鬆政策對於商業銀行股的股價有負面影響，且活期存款對股價的影響亦為負向。

The thesis focuses on the FED policy – Quantitative Easing (QE) and how the policy affect the S&P 500 commercial bank sub-index return. Based on past researches, the article includes macroeconomic variables (IP, PMI), term structure variables, bank balance sheet variables (deposits and loans), and a QE dummy variable. With these variables, the outcomes are generated by regression. It can be observed that with the implementation of QE policy, stock returns are negative on average. Moreover, large banks would benefit from provide more commercial loans; on the other hand, small banks would obtain a positive return by lending more consumer loans. Demand deposits are another significant variable which would have negative impact on stock returns.

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