Browsing by Subject "Stochastic dominance"

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    ItemOpen Access
    Does bitcoin improve optimal portfolios? A stochastic spanning approach
    (2020-09) Rahiminejat, Monireh
    The thesis evaluates the impact of Bitcoin as a means of portfolio diversification on different stochastically efficient portfolios. Here, the stochastic efficient portfolios are the results obtained by applying the stochastic spanning model on 11 different asset classes of various sectors of the financial market. Bitcoin exclusive and inclusive portfolios are compared with Sharpe ratio. Results reveal that in most of the cases, Bitcoin improves the optimal portfolio and should be considered as an asset to be included in investments.
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    ItemOpen Access
    On the role of commodity futures in portfolio diversification
    (Wiley-Blackwell Publishing Ltd., 2021-10) Lean, H. H.; Nguyen, D. K.; Şensoy, Ahmet; Uddin, G. S.
    The last two decades have witnessed major financial crises that led investors to seek alternative assets and investment strategies to reduce their portfolio risk. In this article, we provide information on the role of commodity futures in designing portfolios and managing risk based on an appealing operational framework. Using more than 20 years of sample data, we first investigate the conditional mean and volatility dynamics of equity and commodity futures markets within a dynamic conditional correlation model setup. We then form alternative equity-commodity futures portfolios by changing the weights of commodity futures and examine if the diversified commodity-equity portfolios perform superior to the all-equity portfolios and four well-known investment strategies that suit most practitioners. Stochastic dominance approach shows that including commodity futures in diversified portfolios does not always improve the risk-return performance, except for gold in some particular portfolio setups. Accordingly, commodity assets have behaved like financial assets (stocks) and tend to be driven by the same pricing factors in general, which reduces the benefits of diversification.
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    ItemOpen Access
    On the role of commodity futures in portfolio diversification
    (John Wiley and Sons Inc, 2021-09-20) Lean, H. H.; Nguyen, D. K.; Şensoy, Ahmet; Uddin, G. S.
    The last two decades have witnessed major financial crises that led investors to seek alternative assets and investment strategies to reduce their portfolio risk. In this article, we provide information on the role of commodity futures in designing portfolios and managing risk based on an appealing operational framework. Using more than 20 years of sample data, we first investigate the conditional mean and volatility dynamics of equity and commodity futures markets within a dynamic conditional correlation model setup. We then form alternative equity-commodity futures portfolios by changing the weights of commodity futures and examine if the diversified commodity-equity portfolios perform superior to the all-equity portfolios and four well-known investment strategies that suit most practitioners. Stochastic dominance approach shows that including commodity futures in diversified portfolios does not always improve the risk-return performance, except for gold in some particular portfolio setups. Accordingly, commodity assets have behaved like financial assets (stocks) and tend to be driven by the same pricing factors in general, which reduces the benefits of diversification.
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    ItemOpen Access
    Robust comparative statics for non-monotone shocks in large aggregative games
    (Academic Press, 2018) Camacho, C.; Kamihigashi, T.; Sağlam, Çağrı
    A policy change that involves a redistribution of income or wealth is typically controversial, affecting some people positively but others negatively. In this paper we extend the “robust comparative statics” result for large aggregative games established by Acemoglu and Jensen (2010) to possibly controversial policy changes. In particular, we show that both the smallest and the largest equilibrium values of an aggregate variable increase in response to a policy change to which individuals' reactions may be mixed but the overall aggregate response is positive. We provide sufficient conditions for such a policy change in terms of distributional changes in parameters.