The index lost 0.3 point or 1.01%, to close at 29.27. 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 rallied today to 349,230 shares changed hands for VND2.57 billion compared with 141,800 shares changed hands for VND 1.19 billion yesterday.
The market breadth was negative with 17 gainers, 23 losers, 4 unmoved and the rest untraded.
DLV was the biggest gainer, adding VND4,000 to close at VND17,000 with 200 shares traded.
SDI was the biggest loser today, falling VND2,000 to finish at VND23,000 on a trade of 10,000 units.
UDJ was the most active stock today with 41,400 units traded, whose prices lost VND100 to close at VND6,800/unit.
Foreigners bought 2,000 WSB shares and sold 300 HPL shares today.