The index lost 0.11 points or 0.3% to close at 36.38. The gauge was created in 2009 at the start of 100 points, the highest ever.
The market breadth was negative with 14 rallied, 12 tumbled, and 5 closed unmoved and the rest untraded.
The market volume totaled 437,826 shares changed hands for VND2.89 billion, compared with 435,000 shares valued at VND3.23 billion on Monday trading.
DBM was the biggest gainer, climbing VND1,300 to finish at VND24,800 on a common trade of 100 shares.
SPC was the biggest loser, falling VND2,600 to hit the floor at VND23,400 on a trade of 100 units.
FBA was the most active stock on the gauge with 212,400 shares changed hands, adding up VND300 to hit the ceiling at VND3,900/unit.
Foreigners bought 10,000 BTW shares today.