VN-Index slumps as foreigners dump VNM. Stocks fell modestly on Friday as net foreign selling jumped to USD13 million. VNM (-1.6%) was again in the crosshairs of foreign sellers as the company extended a 4.4% decline over the last three days to reach a three-month low. VNM, which is the market's largest firm, accounting for 14.2% of the index's capitalization, has fallen for five straight weeks.