The index lost 0.16 point or 0.52%, to close at 30.51. 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 fell today with 211, 968 shares changed hands for VND1.55 billion, compared with 250,600 shares changed hands for VND1.7 billion yesterday.
The market breadth was negative with 13 gainers, 19 losers, 5 unmoved and the rest untraded.
ACE was the biggest gainer, adding VND1,100 to hit the ceiling at VND12,900 with 6,200 shares traded.
DDN was the biggest loser, falling VND2,000 to finish at VND20,000 on a trade of 400 units.
UDJ remained to be the most active stock for the second day with 55,000 shares traded, whose price lost VND300 to close at VND6,900.
Foreigners bought 4,500 BTW shares today.