The index went up four points after losing eight points Wednesday. This is its seventh gain in the last 10 sessions, pushing it into the unprecedented 1,440-range.
Trading value on the Ho Chi Minh Stock Exchange (HoSE), on which the index is based, fell over 35 percent from a new historic peak Wednesday to VND27.87 trillion ($1.22 billion).
The VN30 basket, comprising the 30 largest capped stocks, saw 19 tickers in the red, led by GAS of state-owned Petrovietnam Gas with a 2.4 percent drop.
This is its fourth loss in the last five sessions, having fallen 6.4 percent.
STB of Ho Chi Minh City-based lender Sacombank fell 1.6 percent after rising to a near two-month high Wednesday.
CTG of state-owned lender VietinBank lost 1.2 percent after six sessions rising.
NVL of real estate developer Novaland Group dropped 1.1 percent, and ACB of Asia Commercial Bank fell 1 percent.
Ten blue chip tickers gained, led by SSI of leading brokerage SSI Securities Corporation with a 3.1 percent increase to the highest since Sep. 17.
BID of state-owned lender BIDV went up 2.2 percent in its fifth session in the green to hit a near two-month high.
Foreign investors were net sellers to the tune of VND75 billion with strongest pressure on PAN of food company The Pan Group and SSI.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, rose 1.61 percent while the UPCoM-Index for the Unlisted Public Companies Market gained 0.37 percent.