The financial ratios provide an insight to the profitability, liquidity and financial structure of enterprises and enable comparison with similar enterprises. They constitute one of the fundamental criteria in making stock choices as well. Despite this fact, it may not be stated that using financial ratios is an effective and guaranteed method of stock choice because it is fairly difficult to assert that the stock returns of enterprises whose financial ratios are proper shall be positive. The market performance of the stocks may be influenced by not only the potential of the enterprise, but also other external factors pertaining to the market. In this study, Data Envelopment Analysis (DEA) and Malmquist Total Factor Productivity (TFT) analysis have been conducted in order to determine the relationship between the financial ratios of enterprises and their stock returns within a specified period. According to the outcomes of the DEA, the relationship between active enterprises and their stock returns is high during periods when economic balance is achieved. In the analysis conducted on the basis of the TFV index factors, it appears that the likelihood of stocks -whose Technical Effectiveness Change-Technological Change (TEC-TC) and Technical Effectiveness Change-Scale Effectiveness Change (TEC-SEC) factors rise- to receive positive returns is very high.