The index fluctuated at around 1,258.7 points in the morning before plunging to around 1,249 points early afternoon and staying in the red for the rest of the session. It closed with a fall of more than 6 points.
Trading value on the Ho Chi Minh Stock Exchange (HoSE), on which the index is based, fell nearly 8 percent to VND21 trillion ($905.2 million). The bourse saw 143 tickers gain and 274 lose.
The VN30 basket comprising the 30 largest capped stocks saw 18 tickers in the red, with four real estate companies among the biggest losers.
The top blue-chip loser was TCH of real estate company Hoang Huy, down 3.1 percent. The ticker has fallen 15.9 percent from its April 9 peak this year.
VIC of private conglomerate Vingroup dropped 2.4 percent, its sixth consecutive losing session. This ticker has slipped nearly 16 percent from its historic peak of April 19 and was the one that contributed most to VN-Index’s plunge this session, pulling it down by 2.7 points.
VRE of mall operator Vincom Retail experienced a 2.3 percent fall and pulled the index down by 0.4 point this session.
VHM of real estate giant Vinhomes slipped 1.9 percent this session and dragged the index down by nearly 1.7 points. It has dropped nearly 9 percent from its historic peak of April 20.
The top blue-chip gainer this session was STB of private lender Sacombank, rising 5.2 percent to a new peak. The ticker has gained 60.9 percent since the start of this year.
NVL of real estate developer Novaland Group also rose to a new historic peak, up 3 percent for its fifth successive gaining session, pushing the index up by 1.16 points.
Foreign investors were net sellers for the sixth consecutive session to the tune of VND550 billion, with strongest selling pressures on VPB of private lender VPBank, VIC, and VNM of dairy giant Vinamilk.
The HNX-Index for stocks on the Hanoi Stock Exchange, home to mid and small caps, fell 0.72 percent, while the UPCoM-Index for the Unlisted Public Companies Market fell 0.45 percent.