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Tests of Weak‐Form Efficiency of the Dhaka Stock Exchange
Author(s) -
Islam Ainul,
Khaled Mohammed
Publication year - 2005
Publication title -
journal of business finance and accounting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.282
H-Index - 77
eISSN - 1468-5957
pISSN - 0306-686X
DOI - 10.1111/j.0306-686x.2005.00642.x
Subject(s) - heteroscedasticity , econometrics , predictability , autocorrelation , economics , market efficiency , stock exchange , stock market , stock (firearms) , crash , financial economics , statistics , mathematics , computer science , engineering , finance , geography , mechanical engineering , context (archaeology) , archaeology , programming language
Conflicting evidence on weak form efficiency of the Dhaka Stock Market appears to stem from the use of monthly versus daily data, structural changes after the 1996 market crash, and the use of tests with or without heteroscedasticity adjustment. Heteroscedasticity‐robust tests indicate short‐term predictability of share prices prior to the crash, but not afterwards. Although a heteroscedasticity‐robust Box‐Pierce test was used by Lo and MacKinlay (1989) in their simulations, our study appears to be the first to apply this test to stock prices. Typical rejection of weak‐form market efficiency by the usual autocorrelation tests may be reversed by a heteroscedasticity‐robust test.