Vietcombank, generally considered the benchmark bank for commercial foreign currency rates, was selling US dollars for VND 25,502 a piece yesterday, a new peak for the year. It was buying US dollars for 25,180.
Dan Tri has contextualised this with black market prices. On the unofficial market US dollars were being bought for VND 25,570 and sold for VND 25,670, according to the publication.
Using Vietcombank as a reference point with a selling price of VND 25,502 and a black market buying price of VND 25,570, the percentage gain, should someone choose to buy US dollars at Vietcombank and then sell them on the black market, would be .27 percent.
See also: Vietnam Dong Tracker: Daily Updates on the Vietnamese Currency