A multiscale view on inverse statistics and gain/loss asymmetry in financial time series

Details A multiscale view on inverse statistics and gain/loss asymmetry in financial time series A multiscale view on inverse statistics and gain/loss asymmetry in financial time series

2008-11-19

arxiv.org/abs/0811.3122v1

J. Stat. Mech. (2009) P02004

Economy

Quantitative Finance

Statistical Finance

Scientific paper

10.1088/1742-5468/2009/02/P02004

Researchers have studied the first passage time of financial time series and observed that the smallest time interval needed for a stock index to move a given distance is typically shorter for negative than for positive price movements. The same is not observed for the index constituents, the individual stocks. We use the discrete wavelet transform to illustrate that this is a long rather than short time scale phenomenon -- if enough low frequency content of the price process is removed, the asymmetry disappears. We also propose a new model, which explain the asymmetry by prolonged, correlated down movements of individual stocks.

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