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The Markowitz mean-variance optimizing framework has served as the basis for modern portfolio theory for more than 50 years. However, efforts to translate this theoretical foundation into a viable portfolio construction algorithm have been plagued by technical difficulties stemming from the...
Persistent link: https://www.econbiz.de/10005504227
disadvantages of the prevailing algorithm that strongly relies on simulation techniques and is easier to implement than existing … possible to avoid Monte Carlo integration. The paper also develops a new simulation procedure that not only avoids cross … finite number of agents. This procedure can help to improve the efficiency of the most popular algorithm in which simulation …
Persistent link: https://www.econbiz.de/10005114163
In many economic applications involving comparisons of multivariate distributions, supermodularity of an objective function is a natural property for capturing a preference for greater interdependence. One multivariate distribution dominates another according to the `supermodular stochastic...
Persistent link: https://www.econbiz.de/10011083601
Berkshire Hathaway has realized a Sharpe ratio of 0.76, higher than any other stock or mutual fund with a history of more than 30 years, and Berkshire has a significant alpha to traditional risk factors. However, we find that the alpha becomes insignificant when controlling for exposures to...
Persistent link: https://www.econbiz.de/10011083650
We provide new empirical evidence concerning the contentious debate over the use of historical cost (HCA) versus mark-to-market (MTM) accounting in regulating financial institutions. These accounting rules, through their interactions with capital regulations, alter financial institutions’...
Persistent link: https://www.econbiz.de/10011186617
This Paper studies the optimal policies of borrowers (firms or individuals) who may default subject to default costs, and analyses the asset pricing implications. Borrowers defaulting under adverse economic conditions may, despite incurring default costs, emerge as wealthier than non-borrowers...
Persistent link: https://www.econbiz.de/10005788927
After negative shocks, investors with short trading horizons are inclined or forced to sell their holdings to a larger extent than investors with longer trading horizons. This may amplify the effects of market-wide shocks on stock prices. We test the relevance of this mechanism by exploiting the...
Persistent link: https://www.econbiz.de/10008683532
Private pension provision faces the challenging task of providing stable income streams during retirement. The challenge has increased markedly in the last decades due to volatile financial markets, falling interest rates and the withdrawal of employers and external insurers as risk bearers of...
Persistent link: https://www.econbiz.de/10011252616
We introduce the information microstructure of a canonical noisy rational expectations model (Hellwig, 1980) into the framework of a conventional real business cycle model. Each household receives a private signal about future productivity. In equilibrium, the stock price serves to aggregate and...
Persistent link: https://www.econbiz.de/10011083546
We develop a method that allows one to compute incomplete-market equilibria routinely for Markovian equilibria (when they exist). The main difficulty to be overcome arises from the set of state variables. There are, of course, exogenous state variables driving the economy but, in an incomplete...
Persistent link: https://www.econbiz.de/10005124234