The VN-Index posted its third straight positive session, gaining four tenths of a percent Tuesday on strong performances from small and mid-cap stocks while the large-cap VN30 Index dipped six tenths of a percent. The Vingroup family of stocks had a positive impact on the VN-Index. VHM (+2.5%), VIC (+1.4%) and VRE (+2.8%) have respectively increased 8.2%, 4.2% and 6.7% over the last three trading sessions. Industrial park tickers GVR (+6.9%), BCM (+3.8%) and KBC (+6.9%) made strong gains