Market wrap: Stocks extend slump amid light trading. The VN-Index fell for a fifth day in six to a three-week low on Tuesday, closing down 0.7% to give back all of yesterday's gain and a bit more. Trading volume in HCMC dropped to USD131 million, well below the average of the last month of USD173 million. VIC (-2.1%) was the top contributor to the loss amid no apparent news catalyst. GAS (-1.6%) slid after the price of Brent crude oil slumped 2.6% in overnight trading.