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According to regulations of Capital Market Board (CMB), Corporate Governance Principles Compliance Notes are given by independent rating institutions to companies whose shares are traded on Borsa İstanbul. Via those notes the 50 most successful companies on corporate governance are determined. In order to obtain indicators for the price and yield analysis, the 50 most successful shares are included in the Borsa İstanbul Corporate Governance Index. In this study with the exception of financial sector companies, financial performance ranking of 34 out of 50 companies of the Corporate Governance Index is performed by TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) method. TOPSIS method was used based on the 10 financial ratios of the companies. 5 year performance rankings covering the years 2011-2015 were obtained and the ranking changes were examined. Finally, the 5-year average performance rankings were calculated and financial performance ratings of the companies in the index for 5 years is revealed.

In recent years,number of mutual funds has shown a remarkable increase in Turkey. While the number and kind of mutual funds, which assess the collected funds on the basis of risk management, increases, it is becoming more important for investors to choose between several variety of funds. Especially after the activation of the Turkey Electronic Funds Exchange Platform (TEFAS) by Custody Bank and Central Registry Agency of Turkey in 2011/2015, mutual funds have becoma available for more effective use by individual investors. After the TEFAS platform which is enabling individual investors access high performing funds, the need of performance valuation studies which will contribute to making effective decisions between funds have been increased. Supporting mutual fund performance and valuation issues with academic studies and gaining accessible information to system, will contribute to the healthy functioning of the fund market. For this reason, it is essential to apply the most appropriate performance valuation methods. In this work, the methods used in the performance measurement of Investment Fund Industry, data sets and periods of the studies in Turkey and the world are analyzed. From those analysis we try to discover the advantages/disadvantages of different approaches. Thus, arecent performance evaluation of investment funds traded on Turkey will be recommended.