Browsing by Subject "Initial Public Offerings (IPO)"

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    Application of Markowitz mean variance model in the Istanbul Stock Exchange
    (1998) Çetin, Batu
    This main objective of this research work is to determine the efficient portfolio and construct the efficient frontier regarding the whole set of 129 stocks that have been traded in the ISE during the 1992 - June 1995 period. The analysis is based on the Markowitz’s Mean Variance Portfolio Selection Model that has been devised by Harry Markowitz in 1952. The Markowitz’s model is a quadratic optimization model that proves hard to implement as the number of data incorporated into the model increases. Hence, for the implemetation of the Markowitz’s model for the 129 stocks, a program code has been written on GAMS, a special software package for the solution of quadratic optimization problems. The study is concluded by measuring the perforaiance of the efficient portfolio constructed by utilizing the Sharpe’s index performance measurement tool for the June 1995 - December 1995 period monthly data.
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    ItemOpen Access
    The short and long term price performance of initial public offerings in Istanbul Stock Exchange
    (1998) Karakaya, Sevengul
    The present study aims at investigating the price performance of IPO’s in the Istanbul Stock Exchange (ISE) during the 1990-95 period in the short term and long term. The study is also devoted to the procedures for an Initial Public Offerings (IPO) and the existing regulatory environment. The existence of significant abnormal positive returns of new issues on the first day of trading is the proof of underpricing hence investors taking a position in IPO’s during the offering date can enjoy short term return relative to the market. However, on the average, cumulative abnormal returns do not exhibit any significant long term anomaly measured over 750 trading days.