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AbstractCover's celebrated theorem states that the long‐run yield of a properly chosen “universal” portfolio is almost as good as that of the best retrospectively chosen constant rebalanced portfolio. The “universality” refers to the fact that this result is model‐free, that is, not dependent on an underlying stochastic process. We extend Cover's theorem to the setting of stochastic portfolio theory: the market portfolio is taken as the numéraire, and the rebalancing rule need not be constant anymore but may depend on the current state of the stock market. By fixing a stochastic model of the stock market this model‐free result is complemented by a comparison with the numéraire portfolio. Roughly speaking, under appropriate assumptions the asymptotic growth rate coincides for the three approaches mentioned in the title of this paper. We present results in both discrete and continuous time.
101024 Wahrscheinlichkeitstheorie, math.PR, FOS: Economics and business, q-fin.MF, universal portfolio, FOS: Mathematics, 101024 Probability theory, long-only portfolios, Probability (math.PR), Original Articles, Mathematical Finance (q-fin.MF), 101007 Financial mathematics, Diffusions on the unit simplex, log‐optimal portfolio, 101019 Stochastics, Quantitative Finance - Mathematical Finance, 101007 Finanzmathematik, ergodic Markov process, functionally generated portfolios, stochastic portfolio theory, 101019 Stochastik, Mathematics - Probability, long‐only portfolios, log-optimal portfolio
101024 Wahrscheinlichkeitstheorie, math.PR, FOS: Economics and business, q-fin.MF, universal portfolio, FOS: Mathematics, 101024 Probability theory, long-only portfolios, Probability (math.PR), Original Articles, Mathematical Finance (q-fin.MF), 101007 Financial mathematics, Diffusions on the unit simplex, log‐optimal portfolio, 101019 Stochastics, Quantitative Finance - Mathematical Finance, 101007 Finanzmathematik, ergodic Markov process, functionally generated portfolios, stochastic portfolio theory, 101019 Stochastik, Mathematics - Probability, long‐only portfolios, log-optimal portfolio
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influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |