After loss on February 17, the VN-Index edged up on the following day as selling pressure eased and investor confidence improved.
The benchmark index on the southern bourse advanced 0.76 percent to close the day at 574.56 points despite fluctuations in the morning trading session.
More than 160.28 million shares changed hands, and the total trading value reached 2.463 trillion VND (117.2 million USD) on the bourse.
Penny and midcaps were the most active stocks on February 18, while blue chips also posted gains.
The VN30-Index, tracking the southern bourse's top 30 shares by capitalisation and liquidity, rose by 1.06 percent to close at 654.6 points.
Gainers dominated with 22 codes adding value and only three declining.
Becamex IJC (IJC) hit its ceiling price of 12,700 VND (0.6 USD), with a gain of 800 VND (0.038 USD) per share. PetroVietnam Drilling (PVD) also posted a strong gain of 3,000 VND (0.14 USD) per share to reach 76,500 VND (3.6 USD).
Stocks of the real estate sector were active on February 18. The property developer Vingroup (VIC) earned 1,500 VND (0.07 USD) per share to close at 78,000 VND (3.7 USD).
Among blue chips, only Eximbank (EIB), Hoa Sen Group (HSG) and Masan Group (MSN) lost value on February 18.
Overall, on the southern bourse, 172 codes increased while 65 fell.
More than 11.8 million shares of Tan Tao Group (ITA) changed hands on February 18 and led the bourse in liquidity.
On the northern bourse, the HNX-Index rose for the fifth straight day and climbed 1.76 percent to reach 81.04 points.
The HNXFF-Index, composed of stocks with a minimum free-float rate of 5 percent, earned 1.88 percent to end at 79.92 points.
Tracking the 30 top shares, the HNX30-Index ended at 3.66 percent, with a rise of 2.31 percent.
The bourse's liquidity remained high as more than 94.4 million shares, with a total value just short of 1 trillion VND (47.6 million USD), were traded.
After the Tet (Lunar New Year) holiday, liquidity on both bourses has remained high with a strong cash flow.
The total value over several trading days exceeded 3 trillion VND (142.8 million USD).-VNA