The VN-Index closed up just 0.29 percent to 462.05 points after reaching as high as 467 points earlier in the session.
Heavy purchases by foreign investors in many blue chips helped liftsome shares, such as software giant FPT, developers Hoang Anh Gia Lai(HAG), Masan Group (MSN) and Vincom (VIC), insurer Bao Viet Holdings(BVH) and Phu My Fertilisers (DPM), but decliners outnumbered advancersoverall by 163-58.
Foreign investors accounted for overhalf of overall market value on Oct. 7, responsible for transactionstotalling nearly 11.5 million shares and worth about 473.5 billion VND(24.3 million USD). They were net buyers by a volume of nearly 6.7million shares and a value of 301.2 billion VND (15.4 million USD).
Beta Securities Co analysts commented that Oct. 7's market gains wereentirely due to heavy foreign buys in blue chips and were notsustainable.
Strong fluctuations on the foreign currencymarket drove several institutional investors to increase securitiesinvestments to disperse risk, added analysts from Saigon Securities Inc.
On the Hanoi Stock Exchange, which saw less impact fromforeign investors, the HNX-Index declined 1.78 percent on the day toclose at 122.62.
The volume of trades dropped by 20percent from Oct. 6's session to about 23 million shares, with a valueof nearly 539 billion VND (27.6 million USD).
Losersoutnumbered gainers by 208-76, with PetroVietnam Construction (PVX)again being the most-active share on a volume of 2.7 million. PVX closeddown 0.44 percent to 22,700 VND (1.15 USD).
Of the 10leading shares by capitalisation on the northern bourse, Bao VietSecurities (BVS), Tien Phong Plastics (NTP), PetroVietnam Insurance(PVI) and PetroVietnam Technical Services (PVS) rallied.
Dramatic hikes in gold prices and the rising value of the US dollar onthe black market has spooked many domestic investors over the stabilityof the economy, said Bao Viet Securities Co analyst Nguyen Duc Thi.
"There is no positive news currently supporting investor psychology,and the market has not given any signs of a stable uptrend," Thi said./.