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This study investigates the lead-lag relationship of SIMEX MSCI Taiwan Indet futures and spot prices. The sample period is from 1998/3/1 to 1998/3/18. From the two cointegration tests of Engle-Granger''s(1987) "Two Step Estimation" and Johansen''s(1988) "Maximum Likelihood Method", I find a "cointegration" relationship between spot and futures prices. And then, I use the "error correction model" to test the lead-lag realtionship. The empirical results indicate: 1.The lead-lag relationship estimates suggest that two error correction models from different cointegration tests have the same conclusion: futures prices lead spot prices. From Granger''s causality tests, there is an unidirectional causal relatiopship: futures prices Granger-cause spot prices. 2. Futures prices lead spot prices about 15 minutes. In other words, 15-minute-before futures prices have an influence on present spot prices. 3. The conclusion of lead-lag relationship between spot and futures prices corresponds to most empirical results, but conflicts with Lai(1997) who investigates the same futures contract. I think the "volume" is the dominant factor.
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