The index lost 0.04 point or 0.12% to close at 34.71.The gauge started with the given mark of 100 on June 24, 2009 but it has never been back to that level.
The market volume edged down to 5,183,979 shares changed hands for VND250 billion, compared with 5,406,800 shares changed hands for VND265.57 billion on Wednesday trading.
However, the market breadth was positive with 21 gainers, 18 losers, 4 unmoved and the rest untraded.
TNY was the biggest gainer today, adding VND3,000 to close at VND40,000 with 100 shares traded.
DVH was the biggest loser today, falling VND1,200 to hit the floor at VND11,100 on a trade of 100 units.
NHN was the most active stock for a fourth day in a row today with 5,000,000 shares traded. Its reference prices were VND49,000/unit.