The VN-Index opened higher on Thursday and stayed in positive territory to close at the high of the session, up almost one percent, its biggest increase in five weeks. VNM (+1.8%) reached a seven-month high amid no apparent news catalyst. The index's largest listed company by market capitalization is up 16% so far this year and now accounts for more than 12% of the index's total market cap. PVS (+5.4%) surged on news a joint venture with Yinson was awarded a USD1 billion contract