The VN-Index gained 1.8% on Monday — its fifth straight positive session — as investor optimism rises amid hope that global economies are recovering from the COVID-19 pandemic. Trading turnover on HOSE remained high at USD267.8mn vs the one-month average of USD201.2mn. VHM (+3.7%) was the day’s top contributing gainer, hitting a two-month high. GAS (+4.9%) increased for its seventh straight session.