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Stock market and motion of a variable mass spring

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  • Canessa, Enrique

Abstract

We establish an analogy between the motion of spring whose mass increases linearly with time and volatile stock market dynamics within an economic model based on simple temporal demand and supply functions [E. Canessa, J. Phys. A 33 (2000) 3637]. The total system energy Et is shown to be proportional to a decreasing time dependent spring constant kt. This model allows to derive log-periodicity cos[log(t−tc)] on commodity prices and oscillations (surplus and shortages) in the level of stocks. We also made an attempt to connect these results to the Tsallis statistics parameter q based on a possible force–entropy correlation [E. Canessa, Physica A 341(2004) 165] and find that the Tsallis second entropic term ∑i=1Wpiq/(q−1) relates to the square of the demand (or supply) function.

Suggested Citation

  • Canessa, Enrique, 2009. "Stock market and motion of a variable mass spring," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 388(11), pages 2168-2172.
    • Handle: RePEc:eee:phsmap:v:388:y:2009:i:11:p:2168-2172
    DOI: 10.1016/j.physa.2009.02.010
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