The index closed 2.42 points higher after gaining 13.51 points in the previous session.
Trading on the Ho Chi Minh Stock Exchange decreased by 24% to VND14.62 trillion ($600 million).
The VN-30 basket, comprising the 30 largest capped stocks, saw 20 tickers gained and 10 fell.
CTG of state-owned lender VietinBank and HDB of HDBank both led with a 1.5% rise.
They were followed by POW of electricity producer Petrovietnam Power Corporation and VIB of Vietnam International Commercial Bank, up 0.9%.
Nine blue chips fell. SHB of Saigon Hanoi Commercial Bank dropped 1.7% and MWG of electronics retail chain Mobile World closed 0.8% lower.
Foreign investors were net sellers to the tune of VND408 billion, mainly selling FPT of IT giant FPT Corporation and CTG of state-owned lender VietinBank.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 0.15%, while the UPCoM-Index for the Unlisted Public Companies Market went up 0.38%.