The index lost 0.15 point or 0.45% to close at 33.46.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 rose to 412,330 units for VND4.73 billion, compared with 201,750 units for VND1.7 billio on last Friday trading.
The market breadth was positive with 15 gainers, 14 losers, 2 unmoved and the rest untraded.
BTW was the biggest gainer for the third consecutive day, adding VND700 to hit the ceiling at VND7,900 with 100 shares traded.
GHC was the biggest loser today, falling VND1,200 to close at VND10,900 on a trade of 900 units.
WSB was the most active stock today with 269,500 shares traded. Its prices lost VND100 to close at VND17,000/unit.