Abstract
This paper uses daily returns on dual listed stocks traded on the Stock Exchange of Singapore (SES) to test the information-based hypothesis proposed by Longin [16]. The hypothesis is that the rate of information absorption in the conditional variance is faster for foreign shares (open to foreigners and locals) than for local shares (open to locals only). We test this hypothesis using a bivariate GARCH(1,1) model for 9 dual listed stocks over the period 1991–1996. The evidence indicates that the rate of information absorption is consistent with Longin's conjecture that the rate of information absorption varies inversely with the number of informed traders. The results also support previous U.S. evidence by Conrad, Gultekin and Kaul [7]. Our study suggests that in markets with foreign ownership restrictions, removing those restrictions is likely to improve both market efficiency and liquidity.
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