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Optimal Lag In Dynamical Investments

Author

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  • MAURIZIO SERVA

    (Dipartimento di Matematica, Università dell'Aquila, and I.N.F.M., I-67010 Coppito, L'Aquila, Italy)

Abstract

A portfolio of different stocks and a risk-less security whose composition is dynamically maintained stable by trading shares at any time step leads to a growth of the capital with a nonrandom rate. This is the key for the theory of optimal-growth investment formulated by Kelly. In presence of transaction costs, the optimal composition changes and, more important, it turns out that the frequency of transactions must be reduced. This simple observation leads to the definition of an optimal lag between two rearrangement of the portfolio. This idea is tested against an investment in a risky asset and a risk-less one. The price of the first is proportional to NYSE composite index while the price of the second grows according to the American Discount Rate.

Suggested Citation

  • Maurizio Serva, 1999. "Optimal Lag In Dynamical Investments," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 2(04), pages 471-481.
    • Handle: RePEc:wsi:ijtafx:v:02:y:1999:i:04:n:s0219024999000236
    DOI: 10.1142/S0219024999000236
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    Cited by:

    1. Aurell, Erik & Baviera, Roberto & Hammarlid, Ola & Serva, Maurizio & Vulpiani, Angelo, 2000. "Growth optimal investment and pricing of derivatives," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 280(3), pages 505-521.

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