VN-Index skids to four-week low led by VNM, VCB. Vietnamese stocks started the month by falling for a second day of losses. The VN-Index opened higher but quickly lost momentum, dropping to a low for the day at 646 in the morning session before closing down 3.85 points, or 0.6%, at 648.38, its lowest level since July 4. Leading the market lower were VNM (-1.9%), VCB (-1.9%), MWG (-3.0%), CTG (-0.6%) and HT1 (-4.0%), which has slumped 19% since hitting an eight-year high on July 12.