Vietnam’s unofficial exchange market weakened on 19 October, while official benchmarks remained stable.
The black-market mid-rate rose 50 dong to 27,340, up 0.18 percent from the previous day.
Buying and selling rates climbed to 27,300 and 27,380 respectively, reflecting higher demand for US dollars.
The State Bank of Vietnam’s central rate edged down 2 dong to 25,099, while Google’s mid-market rate slipped 5 dong to 26,342.
The spread between the central and black-market mid-rate widened to 2,241 dong, or 8.93 percent, the largest in several days.
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Vietnam exchange rates, 21 October 2025
| 19 Oct | 18 Oct | Change | % | |
| SBV: Central Exchange Rate | 25,099 | 25,101 | -2 | -0.01% |
| Google Finance: Mid Market Rate | 26,342 | 26,348 | -5 | -0.02% |
| Black Market: Buy | 27,300 | 27,240 | 60 | 0.22% |
| Black Market: Sell | 27,380 | 27,340 | 40 | 0.15% |
| Black Market: Mid-market | 27,340 | 27,290 | 50 | 0.18% |
| Spread: SBV / Black Market MM | 2,241 | 2,189 | 52 | 2.38% |
| Spread: SBV / Black Market MM | 8.93% | 8.72% | – | – |
Interbank rates
Vietnam’s interbank market saw a broad decline in short-term lending rates on 19 October, signalling improved liquidity.
The overnight rate dropped 0.78 percentage points to 4.97 percent, while the one-week rate fell 0.53 points to 5.19 percent and the two-week rate slid 0.56 points to 5.24 percent.
Longer tenors were mixed, with the one-month rate inching up 0.02 points to 5.48 percent and the three-month rate easing slightly to 5.68 percent.
The six-month tenor rose 0.17 points to 6.00 percent, while the nine-month rate remained unchanged at 6.00 percent.
Vietnam interbank interest rates, 21 October 2025
| 19 Oct | 18 Oct | Change | |
| Overnight | 4.97 | 5.75 | -0.78 |
| 1 Week | 5.19 | 5.72 | -0.53 |
| 2 Weeks | 5.24 | 5.80 | -0.56 |
| 1 Month | 5.48 | 5.46 | 0.02 |
| 3 Months | 5.68 | 5.79 | -0.11 |
| 6 Months | 6.00 | 5.83 | 0.17 |
| 9 Months | 6 | 6 | 0.00 |
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