The significant differences of the weekend effect on two stock exchanges of Vietnam were recorded on Mayday and Tuesday. Coming back to the descriptive statistic, the results showed the stronger effect on the Ho Chi Minh City Stock Exchange compared to the Hanoi Stock Exchange.
However, the week effect was just investigated through the closing index of the Vietnam stock exchanges. It cannot explain deeply the pattern of this effect on the Vietnam stock market. In the future, researchers should investigate about the behaviours of the investors and other aspects to know more about the day of the week effect. Moreover, other anomalies should be investigated on the stock markets of Vietnam especially the anomalies which are closely related to the weekend effect such as the holiday effect, or the January effect. These anomalies somehow can explain the weekend effect.