Black-Market USD Rate Falls Below Banks for First Time in Years

Overview

For the first time in years, black-market USD rates in Vietnam have fallen below official bank quotes, trading around 26,000-26,200 VND on August 5. This marks a reversal of the typical premium on the unofficial market and comes as the State Bank of Vietnam (SBV) raised the central reference rate by 25 VND to 25,405 VND. The development affects major banks like BIDV (BID, HOSE), which are seeing reduced arbitrage opportunities and shifting demand patterns.

Key Facts

• Black-market USD buy rate: 26,000-26,100 VND; sell rate: 26,100-26,200 VND on August 5.
• Bank USD buy rate: 26,050-26,080 VND; sell rate: around 26,460 VND at Vietcombank, Vietinbank, BIDV.
• Black-market buy rate is 30-50 VND lower than banks; sell rate is nearly 300 VND lower.
• SBV central reference rate increased by 25 VND to 25,405 VND, a record high.
• Central reference rate has risen 2% over the past two months.
• Trading band is ±5% around the reference rate, implying a range of 24,134-26,675 VND for the day.
• MB Securities forecasts USD/VND at 26,800-27,000 by year-end, up 2-2.8% from start of year.

What Happened

On the morning of August 5, unofficial currency exchange points in Vietnam quoted USD buy rates at 26,000-26,100 VND and sell rates at 26,100-26,200 VND. In contrast, major banks such as Vietcombank, Vietinbank, and BIDV were buying USD at 26,050-26,080 VND and selling around 26,460 VND. This means the black-market buy rate is now 30-50 VND lower than banks, and the sell rate is nearly 300 VND lower—a rare inversion that has not been seen for years.

A manager of a currency exchange point in central Hồ Chí Minh City attributed the decline to a sharp drop in public demand for USD compared to early in the year. The SBV also announced a 25 VND increase in the central reference rate to 25,405 VND, a record high, with the trading band showing signs of widening in recent weeks. The reference rate has risen 2% over two months, reflecting ongoing depreciation pressure on the đồng.

Market Context

BIDV (BID) closed at 38,000 VND on August 4, 2026, on the HOSE. The banking sector is closely tied to FX dynamics, as banks profit from currency trading and face balance-sheet risks from USD exposure. The narrowing gap between black-market and official rates reduces arbitrage opportunities and may shift some demand to banks, potentially boosting their FX service revenue. However, the continued rise in the central reference rate signals persistent depreciation pressure, which could weigh on bank margins if not managed carefully. The broader market has been cautious amid global USD strength and domestic inflation concerns.

Strategic Significance

For long-term investors, the convergence of black-market and official USD rates indicates improving confidence in the đồng’s stability, at least in the short term. This could reduce speculative demand for USD and ease pressure on the SBV to intervene. For BIDV and other banks, a stable FX market supports their net interest margins and reduces the risk of large revaluation losses. However, the SBV’s gradual depreciation of the reference rate suggests a deliberate policy to maintain export competitiveness, which may continue to pressure the đồng. Banks with strong FX management and diversified income streams are better positioned to navigate this environment.

What to Watch

• SBV’s daily central reference rate announcements for further adjustments.
• BIDV’s Q3 2026 earnings report for FX trading income and margin trends.
• Any changes in the trading band (currently ±5%) that could signal policy shifts.
• Monthly trade balance and foreign investment flows, which influence USD demand.
• Black-market rate movements relative to bank rates to gauge sentiment shifts.