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This book is a short introduction into the complexity of indices - factors for constructing an index, the weighting of an index and the return of an index. This book is a short introduction into the complexity of indices. Short examples on the basis of the DJIA and the S&P 500 explain the usage of indices for investors. Finally the ATX is used as a sample of the indices used at Wiener Börse. The compensation, calculation and regulation of the ATX is shown in this book. I dedicate this book to my parents who have always believed in me.

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