Does customer satisfaction really lead to increased firm value? Traditionally, most financial valuation models do not include customer-related metrics such as customer satisfaction in the process. Studies in marketing, on the other hand, have consistently found that customer satisfaction improves the ability to predict future cash flows, long-term financial measures, stock performance, and shareholder value. This research examines the impact that customer satisfaction has on firm value by employing valuation models borrowed directly from the practice of finance. The data used in the analysis is compiled by merging publicly available customer satisfaction data from the ACSI (American Customer Satisfaction Index) with financial data from COMPUSTAT, and Center for Research in Securities Prices between 1996 and 2006. The results indicate that a portfolio of stocks consisting of firms with high levels and positive changes in customer satisfaction will outperform lower satisfaction portfolios along with Standard & Poor’s 500… Customer satisfaction does matter!