Although foreign investors increased offloads of shares on August 13, heavy buying of domestic investors helped lift stock indices on the two exchanges.

On the Hochiminh Stock Exchange, the benchmark VN-Index inched 0.16 percent to close August 13 session at 602.76 points as the advancers doubled the losing stocks.

Liquidity improved with the market value rising 30 percent over the previous session, totaling 1.84 trillion VND (87.2 million USD) while the market volume climbed 20 percent to nearly 96 million shares and fund certificates.

Trading focused on blue chips with trading value accounting for more than 60 percent of total market.

Companies which posted positive business results included Vietcombank (VCB) and HCM City Infrastructure Investment Co (CII), while those expecting growth from the Mid-Autumn festival, like confectionery maker Kinh Do Corporation (KDC), gained.

Twenty of the top 30 stocks with the highest market value and liquidity advanced while six declined, lifting the VN30 Index up 0.81 percent to end at 645.17.

Slumping large-cap shares like Masan Group (MSN), PV Gas (GAS) and VinGroup (VIC) curbed market growth.

FLC Group (FLC) remained the most active stock with nearly 14 million shares changing hands, but the share price still managed to sink 2.84 to finish at 13,700 VND per share.

Foreign investors were net sellers, responsible for a total net sell of more than 202 billion VND (9.6 million USD).

On the Hanoi Stock Exchange, the HNX-Index rose to a four-month high of 81.82 points, up 1.68 percent from August 12.

The HNX30, which tracks the top 30 shares by market value and liquidity on the exchange, also climbed 2.45 percent to stand at 165.44 points.

Money flowed into oil companies like PetroVietnam Construction Corp (PVX), PetroVietnam Technical Services Corp (PVS), PetroVietnam Engineering Consultancy Co (PVE) and PetroVietnam Drilling Mud Co (PVC), rallying their share prices.

There were minor changes to trading volume from the previous session, totaling more than 66 million shares, but the value of trades fell 20 percent to 904 billion VND (42.8 million USD).

In contrast to the southern bourse, foreign investors concluded as net buyers in Hanoi, picking up shares worth 29.5 billion VND (1.4 million USD).-VNA