Stocks break four-day rally. The VN-Index started off the week on a negative note, giving back all of last week's gains and then some. The index traded slightly higher early in the morning session, but faded badly in the afternoon and closed at the low for the day. HT1 (-5.9%) fell amid concerns that oversupply in northern Vietnam could undermine the company's FY16 EBITDA margins while investors took profits in CII (-3.4%) after the firm announced an increase in its FOL to 70% on Friday.