This paper examines the interaction between international national stock markets using daily data and a VAR model. The results indicate that the speed of adjustment to equilibrium after a shock is about two days, indicating that markets are highly efficient at processing international information. Moreover, the US market appears to be the most important in the system, while Japan is very independent and does not have much effect on the other markets in the sample. Finally, the recent Asian financial crisis appears to have amplified the importance of the Asian markets to the rest of the global exchanges.