Moody's downgrading of Greece's credit rating overnight helped snap a modest five-day rally on the HCM Stock Exchange on June 15, sending the VN-Index off by 0.06 percent to a close of 508.01 points.

The value of trades remained relatively unchanged from the previous session, totaling 1.6 trillion VND (84.2 million USD) on a volume of 48.4 million shares.

Ocean Group (OGC) saw the greatest trading volume for a second day, with 3.9 million shares changing hands, as the group's major shareholder, FPT Capital, announced it had cancelled a previously announced decision to sell off 2 million OGC shares. OGC rose nearly 5 percent in value, reaching its ceiling price.

Vietcombank (VCB) was another of the day's few high-profile gainers, closing up 1.57 percent.

On the Hanoi Stock Exchange, the HNX-Index managed a gain of 0.43 percent to end the session at 160.45 points. Trading continued to be active, with 38.9 million shares changing hands, worth a combined 1.3 trillion VND (68.4 million USD).

Stocks under the auspices of the PetroVietnam Group helped sustain the northern market, with many major shares in the sector posting gains, including PetroVietnam Land (PVL), which rose by nearly 4 percent; PetroVietnam Insurance (PVI) up 0.39 percent; and PetroVietnam Technical Services (PVS) up 0.32 percent.

PetroVietnam Construction (PVX), Hanoi 's most-active share with a volume of 6.8 million, advanced by 1.6 percent in value.

Foreign investors were net buyers on June 15 on the southern market by a volume of 1 million shares, worth a net of 50 billion VND (2.6 million USD), but they were sellers of a net of 56,400 shares on the northern market, worth 442 million VND (23,263 USD)./.