Zugl.: Wiesbaden, Real Estate Management Inst., Diss., 2007.

In this thesis we will evaluate the effectiveness of using daily return percentiles and power means as momentum indicators for quantitative portfolio selection. The statistical significance of momentum strategies has been well-established, but in this thesis we will select the portfolio size and holding period based on current (2012) trading costs and capital gains tax laws for an individual in the United States to ensure the viability of using these strategies. We conclude that the harmonic mean of daily returns is a superior momentum indicator for portfolio construction over the 1970-2011 backtest period.

MV is the traditional method to treat international portfolio selection problems, which bases its theory on the assumption of Normal Distribution. However, during economy recession the portfolio return turns out to be a fat tail distribution. Therefore, in this sense, we explore Roy’s SF criterion and apply the extreme theory to the historical data. We demonstrate how such portfolios would perform during the Asian Crisis, IT Bubble Bust and the Financial Crisis separately. We also compare the SF portfolio’s performance to the MV portfolio’s performance, therefore to check, SF and MV portfolio, which will outperform during bust and boom of the economy. The Asian Crisis was marked with great currency devaluation and lower currency return on equity. The Dot.Com Bubble Busts was known for its sharp plummet in the stock market, while, the Financial Crisis was known as the large falls in the US stock market and elsewhere. They are the extreme events of the world capital markets, which in some way contribute to the non-normal distribution. Simulated results over the 1997-2010 period which include six busts and booms: the Asian Crisis, period after Asian Crisis, IT Bubble Bust, period after IT Bubble Bust, The Financial Crisis and period after The Financial Crisis, indicate that SF portfolio outperforms MV portfolio during most of the times, this result is especially obvious for Indonesian and Thailand.

In Banken wird zunehmend das Modell von Markowitz zur Portfoliooptimierung als verkaufsförderndes Instrument verwendet. Dieses Modell stellt jedoch lediglich eine theoretische Grundlage zur Portfoliobildung dar, berücksichtigt jedoch keine Transaktionskosten oder Besonderheiten von Kleinanlegern. Es wird in die Thematik der Portfoliooptimierung eingeführt und mit Hilfe praktischer Überlegungen zur Kostenstruktur eine Modellwelt zur Ermittlung des erwartenen (Nutzen des) Endvermögens entwickelt. Dabei wird das Black-Scholes- Modell verwendet um in Simulationen Handlungsempfehlungen unter Berücksichtigung besonderes Eigenschaften von Kleinanlegern herauszuarbeiten und den Einfluss von Kosten auf das Endvermögen zu analysieren. Zur Bestimmung optimaler Portfolios kommt die Martingalmethode zur Lösung eines dynamischen Optimierungsproblems zum Einsatz.

Thesis (doctoral)--Universität St. Gallen, 2000.

In this paper, I evaluate the out-of-sample performance of the portfolio optimizer relative to the naïve and market strategy on the Swedish stock market from January 1998 to December 2012. Recent studies suggest that simpler strategies, such as the naïve strategy, outperforms optimized strategies and that they should be implemented in the absence of better estimation models. Of the 12 strategies I evaluate, 11 of them significantly outperform both benchmark strategies in terms of Sharpe ratio. I find that the no-short-sales constrained minimum-variance strategy is preferred over the mean-variance strategy, and that the historical sample estimator creates better minimum-variance portfolios than the single-factor model and the three-factor model. My results suggest that there are considerable gains to optimization in terms of risk reduction and return in the context of portfolio selection.

Zugl.: Münster (Westfalen), Universiẗat, Diss., 2007.

Zugl.: Jena, Univ., Diss., 2004

St. Gallen, University, Diss., 2005.

Thesis (doctoral)--University of Passau, 2007. / Includes bibliographical references (p. [127]-133).