Investors enjoyed their biggest gains in four weeks as the VN-Index advanced more than one percent. The market, however, continued to be plagued by weak volume, with the combined value traded in HCMC and Hanoi barely reaching above USD90 million. Gains in Vietnam followed a global trend in Asian and European markets on Monday after the FBI over the weekend cleared US presidential candidate Hillary Clinton of wrongdoing in connection with her use of emails as Secretary of State.