Dollar falls against dong

Vietcombank sold the greenback at VND26,376, a 0.008% dip from the weekend. On the black market, the currency went up 0.43% to around VND27,632.

The State Bank of Vietnam reduced its reference rate by 0.008% to VND25,120.

Globally, the dollar firmed slightly on Monday as investors braced for the release of a slew of U.S. economic data following the ending of the government's shutdown, hoping it will add clarity to the Federal Reserve's rate outlook in December, Reuters reported.

Currency moves were subdued in early Asia trade on Monday ahead of the releases, with the euro down 0.11% to $1.1607 while the Australian dollar reversed some of its gains from last week and eased 0.15% to $0.6527.

The New Zealand dollar similarly fell 0.12% to $0.5673, while the U.S. dollar index rose slightly to 99.37. The British pound traded 0.11% lower at $1.3161.

The safe-haven Swiss franc hovered around a one-month high and last stood at 0.7941 per dollar, finding support from jitters over an ugly selloff in stock markets recently.

"We suspect that this U.S. dollar weakness in November reflects speculative traders closing long U.S. dollar positions ahead of heightened volatility as a higher-than-normal rate of U.S. data emissions prevails over the next few weeks," said Thierry Wizman, global FX and rates strategist at Macquarie Group, in a note.