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Long Memory of the Indian Stock Market

  • Ashutosh Verma
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    The weak form of efficient market hypothesis states that the share prices neither have a long memory nor a short memory. Long memory is characterized by non-periodic dependence in a financial time series over a long span of time. This paper examines the long memory of the Indian stock market by examining the daily returns of 60 companies with around 62% of the total market capitalization over a period of five years. The test applied to examine the long memory is Lo’s modified rescaled long range (R/S) test, which is able to derive variance of the time series with a consistent estimate. This test is an improvement over the classical rescaled long range test and is not sensitive to short-term dependence. The results of the study indicate that the returns of only three companies exhibit long-range dependence. The computed test statistics for all other companies were found to be insignificant and showed the absence of long memory, supporting the weak form efficiency of the market.

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    Article provided by IUP Publications in its journal The IUP Journal of Financial Economics.

    Volume (Year): VI (2008)
    Issue (Month): 3 (September)
    Pages: 74-83

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    Handle: RePEc:icf:icfjfe:v:06:y:2008:i:3:p:74-83
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