Dollar weakens against dong

Vietcombank sold the dollar at VND25,473, down 0.02% from Thursday.

The greenback slid 0.04% to VND26,020 on the black market.

The State Bank of Vietnam (SBV) lowered its reference rate by 0.02% to VND24,260.

Since the beginning of the year, the dollar has increased against the dong by 4.31%.

Globally, the dollar was headed for a second straight quarterly gain and jumped to a near four-decade high on the battered yen on Friday as traders tentatively tested Japan's resolve to defend its currency, while waiting on crucial U.S. inflation data, Reuters reported.

The yen hit 161.27 per dollar, its weakest since 1986 and the euro dipped 0.1% and was last at $1.0693.

The dollar index equaled Wednesday's eight-week high of 106.13 and has logged a 1.5% rise for the quarter so far.

Republican U.S. presidential candidate Donald Trump unleashed a barrage of at-times false attacks on President Joe Biden in their first campaign debate in Atlanta, with the dollar rising as Biden stumbled over his words a few times in early exchanges.

"Biden came across poorly," said Jason Wong, market strategist at BNZ in Wellington.

That increased the odds of a Trump presidency and import tariffs, he said, noting traders were buying dollars but moves were fairly modest.