The Vietnamese market extended gains for a second session, enjoying its largest one-day increase since March 2. The VN-Index rose 7.5 points, or 1.3%, to close at 567.8. Gainers were led by banks, which have found their footing again after a broad pullback last month. VCB (+2.4%), CTG (+1.8%), BID (+1.8%) and MBB (+2.1%) were among the top movers. Energy stocks, buoyed by higher global crude prices overnight and in Asian trading Wednesday, also helped pull the market up. GAS soared 4.9%,