The index lost 0.17 point or 0.49% to close at 34.39.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 doubled to 5,046,333 shares changed hands for VND242.47 billion, compared with 2,150,440 shares changed hands for VND100.85 billion on Monday trading.
However, the market breadth was positive with 16 gainers, 15 losers, 8 unmoved and the rest untraded.
SCO was the biggest gainer today, adding VND800 to close at VND10,000 with 100 shares traded.
WSB was the biggest loser for the second day today, falling VND1,500 to close at VND16,500 on a trade of 1,000 units.
NHN was the most active stock for the second day today with 4,810,000 shares traded. Its reference prices were VND49,000/unit.
Foreigners stayed on the sidelines today.