The UPCoM-Index, the measure of 131 unlisted public companies, opened the second week of the year lower as big stocks went south on lack of boosting news.
The index lost 0.12 points, or 0.36 percent, to settle at 33.49. It lost 0.44 percent last week.
Among index members, 9 rallied, 21 tumbled, and 101 closed unmoved. Up to 92 stocks closed untraded.
The market volume totalled 2.4 million shares valued at 115 billion dong, compared with 117,000 shares and 580 million dong from last Friday.
BXD was the biggest gainer, climbing 38 percent to finish at 5,100 dong on a trade of 100 shares.
In the downswing, CHP was the biggest loser, erasing 10 percent to close at 4,500 dong on a trade of 16,000 units.
NHN was the most active stock on the gauge with 2.3 million shares changed hands, which traded off floor.
Foreigners traded only NBW and PSP shares today.