Fed Rate-Hike Probability Hits 86.7%: What Scenario Awaits Vietnam's Market?
A Meeting That's No Longer a Mystery
As the Federal Open Market Committee (FOMC) meets over two days on September 15-16, the question is no longer whether the Fed will act, but how the market will interpret and price that decision. The probability of a 25-basis-point rate hike has jumped to 86.7% according to CME FedWatch data, up from around 70% previously. On Polymarket, the figure is also hovering near 80%.
This sharp shift in market expectations stems from the August CPI report, which showed a 0.4% month-over-month increase and kept annual inflation running at 3.4%. Notably, this round of price pressure did not spread broadly across the economy, the rise in telephone service costs alone was enough to push core CPI from around 0.2% to 0.3%. A change that small was enough to force the market to reprice the entire rate path.
Beyond inflation, the labor market continues to show considerable resilience. The US economy added 162,000 nonfarm payrolls in August, far above forecasts, while the unemployment rate held at 4.1%. Average hourly earnings rose 0.3% month-over-month and 3.1% year-over-year. These figures don't yet point to a clear wage-price spiral, but they're enough to give the Fed room to keep its focus on taming inflation.
Geopolitical factors are adding further complexity to the picture. Oil prices have pushed past $100 as tensions around Iran and the Strait of Hormuz escalate, adding another layer of cost-side inflationary pressure. Rising oil prices have also pushed bond yields higher, the 10-year US Treasury yield came close to the 5% mark before pulling back, though it remains above 4.9%, weighing heavily on the stock market.
That said, it's worth noting this is a supply-side shock, the kind of inflation that monetary policy can't address effectively through rate hikes alone.
Why Is the Fed Still Raising Rates?
In the current context, a rate hike looks more like a precaution than the start of a new tightening cycle. Current data shows some new inflation risks taking shape, but not enough to conclude that persistent price increases have spread across the whole economy. A single hike that markets have already braced for psychologically won't solve the long-term yield problem either.
The bigger issue lies behind the 25-basis-point decision itself: who will absorb the growing duration risk from US Treasuries and credit markets?
This is a question about the supply-demand structure of the Treasury market, not simply about the policy rate. After the 2026 midterm elections, how the US Treasury structures its issuance, conducts buybacks, and manages its cash balance could affect the cost of capital more than the Fed's 25-basis-point move itself.
Economists remain divided over how necessary this move really is. Of 70 economists surveyed, about 37 expect the Fed to raise rates. Diane Swonk, Chief Economist at KPMG, put it this way: "A 25-basis-point increase may be just the first step, not the last." That view reflects concern that if inflation stays sticky, the Fed may need to act more forcefully in the fourth quarter.
Impact on Vietnam: Transmission Channels and Scale of Effect
Exchange Rate: Under Pressure, But Not in a Straight Line
The exchange rate's reaction to the Fed's decision is the most direct transmission channel. On September 15, the State Bank of Vietnam raised the central reference rate to a record 25,617 VND/USD, while the DXY climbed to 99.41 points ahead of the Fed meeting.
According to expert Tran Trong Duc, Founder & CEO of Virtus Prosperity, this looks like Vietnam positioning itself ahead of the sharp swings that could occur around the time the Fed announces its decision. He also cautions against the simple assumption that a Fed hike automatically means a strong dollar and a corresponding depreciation in the VND. What matters isn't just whether the Fed raises rates, but whether that decision and the message that follows come across as more hawkish than what the market has already priced in.
If the Fed raises rates by 25 basis points while that move has largely been priced in and reassures markets that no further hikes are coming, the direct impact on the dollar should be relatively contained. If, instead, the Fed hikes while signaling the start of a prolonged tightening process, the pressure on USD/VND will be considerably greater.
For Vietnam, US interest rates are just one of many factors driving the exchange rate. Plenty of other important variables remain in play including FDI disbursement, the trade balance, portfolio flows, remittances, and more. What matters most right now is that policymakers keep enough flexibility to balance the exchange rate, inflation, and growth, rather than pursuing goals that could work against one another.
Domestic Interest Rates: Not a Mechanical Tracker of the Fed
In Vietnam, the domestic market may fear that a Fed hike will pull local interest rates up with it. According to expert Tran Trong Duc, Founder & CEO of Virtus Prosperity, domestic rates in practice don't move in close step with the Fed's policy rate. The Fed's most direct effect falls on short-term USD rates, the short-term USD–VND rate differential, capital flows, and the exchange rate. The rate that Vietnamese businesses and households actually pay depends far more on banking-system liquidity, credit growth, capital demand in the economy, and credit risk.
Even if the Fed raises rates in September, that isn't necessarily the start of a new monetary tightening cycle like those seen before. The State Bank of Vietnam is targeting credit growth of around 15% in 2026 and will keep running a flexible monetary policy that supports growth while holding average inflation near 4.5%.
That said, if the Fed genuinely re-enters a hiking cycle, domestic interest rates, especially deposit and lending rates, will feel the effect. Any cooling of domestic rates could then be pushed back to 2027. And if domestic capital demand keeps climbing quickly, Vietnam's room to cut rates further will also be quite limited.
Foreign Capital Flows: Rising Risk of Net Outflows
Vietnam's stock market is facing an important "stress test" as the Fed raises rates, posing a direct threat to the exchange rate and foreign capital flows. One of the most worrying consequences is that foreign capital could flow out of emerging markets like Vietnam.
Persistent net selling by foreign investors remains one of the biggest drags on Vietnam's stock market. Year-to-date, foreign investors have sold a net of roughly VND 94 trillion.
Although there have been signs of cooling, global interest rates have stayed higher for longer than expected, prompting foreign capital to drift away from emerging markets. Notably, the pressure to pull capital out isn't coming from interest rates alone, it's also rooted in the structure of global investment portfolios. Vietnamese equities are cheaply valued, but the market lacks the stocks tied to the AI investment wave that has been the main profit driver globally, which is another reason foreign capital has stayed lukewarm.
Stock Market: VN-Index Facing a Psychological Resistance Level
The VN-Index has just pulled back more than 70 points, breaking below the 1,800 mark as the Fed's policy meeting draws near and the market weighs the odds of a hike. If the Fed raises rates by 25 basis points in September and the DXY together with US Treasury yields stay elevated, renewed pressure on the exchange rate and foreign flows in the closing months of the year could make it hard for the VN-Index to clear the 1,930 peak unless rates start to cool.
The market currently prices the odds of a 25-basis-point Fed hike at close to 86.7%, meaning this factor is largely already reflected in prices. Investors shouldn't turn bearish on stocks either. The real risk lies in the Fed signaling further tightening at upcoming meetings, only then would a deeper correction be likely.
According to expert Tran Trong Duc, Founder & CEO of Virtus Prosperity, there is also a low-probability scenario worth mentioning: the Fed could still choose to hold rates steady. President Donald Trump has repeatedly made his views on rates known ahead of the Fed's September policy meeting, pressing for lower rates and declaring: "Cut interest rates, or I will stop trading with the countries we run deficits with." The message also suggests Trump is reviving his pressure campaign on the Fed since his own nominee, Kevin Warsh, was installed as Fed Chair. Should this scenario play out, it would be a positive shock for markets worldwide, Vietnam included.
What Really Matters for Vietnam?
Against this backdrop, Vietnamese investors should keep an eye on three key factors.
First, the message that follows the Fed meeting matters more than the 25-basis-point figure itself. The Fed is likely to avoid committing to a rate path in advance, while spelling out more clearly the goals and conditions that could prompt it to act. If the Fed Chair signals that this is a one-off precautionary move, the impact on Vietnam will be limited. If the signal instead points to another hike in December, the pressure on USD/VND and VND interest rates will be greater.
Second, long-term global government bond yields need to be watched in parallel. The Fed has considerable sway over short-term rate expectations, but 10-year and 30-year yields also reflect long-term inflation expectations. The cost of capital for governments and businesses worldwide will rise, and Vietnam is unlikely to be immune to that trend.
Third, Vietnam's own internal dynamics, including banking-system liquidity, credit growth, and capital demand in the economy, are what actually determine the interest-rate level that businesses and households face. The State Bank of Vietnam will keep running monetary policy proactively and flexibly, managing interest rates and the exchange rate in line with market conditions.
Conclusion
The Fed will most likely raise rates by another 25 basis points at its September meeting, taking the target range to 3.75–4.00%. This is being read, however, as a precautionary move rather than the start of a sustained 50–75 basis point tightening cycle.
For Vietnam, the impact of this decision will be transmitted mainly through the exchange rate and foreign capital flows. Pressure on the VND is real, but not yet cause for serious concern if the Fed hikes once and then pauses. More important is that Vietnam maintain flexibility in running monetary policy, prioritizing macro stability and supporting growth rather than mechanically chasing every twist in Fed policy.
In a global rate environment that remains highly uncertain, Vietnam's edge lies in its relatively stable macro fundamentals, steadily rising FDI disbursement, and still-reasonable policy space. Keeping the exchange rate flexible enough to absorb external shocks, combined with keeping inflation under control, will be the key to navigating this volatile stretch.
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