Trends in Stock Prices and Range to Standard Deviation Ratio

Subrata Kumar Mitra


Hurst exponent (H) measured from R/S ratio, is being used as a measure to find predictability of a time series. The
larger the H value, the stronger is the trending trait in the time series. In this paper, we estimated R/S ratio of
several stock indexes of Indian market for 10 years. Though the overall Hurst exponent values for the selected
series were close to 0.5, the value varied widely on period-to-period basis. The analysis of R/S ratio on a smaller
window size of 30 trading day revealed a positive relationship between R/S ratio and performance of a moving
average based trading rule.

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International Journal of Business and Management   ISSN 1833-3850 (Print)   ISSN 1833-8119 (Online)

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