The index lost 0.16 point or 0.55%, to close at 29.11. 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 plunged today to 76,240 shares changed hands for VND0.57 billion compared with 349,230 shares changed hands for VND2.57 last Friday.
The market breadth was negative with 12 gainers, 24 losers, 5 unmoved and the rest untraded.
BTG was the biggest gainer, adding VND3,000 to close at VND13,000 with 400 shares traded.
CFC was the biggest loser today, falling VND1,100 to hit the floor at VND9,900 on a trade of 100 units.
BTW was the most active stock today with 12,000 units traded, whose reference prices were VND7,800/unit.
Foreigners bought 2,900 WSB shares today.