The index lost 0.16 point or 0.44% to close at 36.24.The gauge started with given mark of 100 on June 24, 2009 but it has never been back to that level.
The market volume fell to 727,426 shares changed hands for VND3.8 billion, compared with1,019,869 shares changed hands for VND4.81 billion on Tuesday trading.
The market breadth was negative with 5 gainers, 20 losers, 10 unmoved and the rest untraded.
DBM was the biggest gainer today, climbing VND1,700 to close at VND20,500/unit on a trade of 100 shares.
SPC was the biggest loser today, giving up VND2,200 to hit the floor at VND19,800 with 100 units changed hands.
STV was the most active stock today with 490,000 shares traded, its reference price was VND5,000/unit.
Foreigners bought 1,000 BTW shares; 5,100 DTV shares; 2,100 PJS shares; 7,700 VCT shares and sold 5,000 VTA shares today.