Minimizing the expected market time to reach a certain wealth level

Details Minimizing the expected market time to reach a certain wealth level Minimizing the expected market time to reach a certain wealth level

2009-04-13

arxiv.org/abs/0904.1903v1

Economy

Quantitative Finance

Portfolio Management

13 pages

Scientific paper

In a financial market model, we consider variations of the problem of minimizing the expected time to upcross a certain wealth level. For exponential Levy markets, we show the asymptotic optimality of the growth-optimal portfolio for the above problem and obtain tight bounds for the value function for any wealth level. In an Ito market, we employ the concept of market time, which is a clock that runs according to the underlying market growth. We show the optimality of the growth-optimal portfolio for minimizing the expected market time to reach any wealth level. This reveals a general definition of market time which can be useful from an investor's point of view. We utilize this last definition to extend the previous results in a general semimartingale setting.

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