Gap widens as the SBV plays catch up with the grey market Pressure mounting on the grey market gave way to a knee jerk reaction from the SBV, who, for the first time since August 24th, depreciated the exchange rate by 10 dong from VND20,628/USD to 20,638/USD. Insufficient, the move was unable reduce the gap between the official and grey market rates, which widened to 386bps as the dong traded to VND21,650/USD on the grey market.