According to an analysis presented by an economist in a Seu Dinheiro video that adjusts for inflation in both countries, the real spent much of 2026 overvalued, and the dollar at R$ 5.50 only undoes part of that. For investors, the takeaway is that May's cheap exchange rate was the exception, and what is currently supporting the real is almost entirely high interest rates.
Is the Real Undervalued or Was It Overvalued?
The economist interviewed by Seu Dinheiro points to the second option. By comparing the exchange rate with accumulated inflation in Brazil and the United States, the analysis shows that the real experienced periods of sharp appreciation sustained by the interest rate differential. Under this reasoning, a currency that remains strong for too long tends to go through a period of depreciation afterward. The video does not claim that the real is cheap today; rather, it shows that the nominal exchange rate alone is misleading.
The year 2026 illustrates this argument well. According to the Central Bank's Ptax rate, the currency finished at R$ 5.5013 on November 6, its highest level of 2026 and practically the same as the final day of 2025 (R$ 5.5024). In between, the real was briefly a global standout: in May, it established itself as the currency that had appreciated the most against the dollar in 2026 among the 31 most traded currencies.
From the May low to November 6, the increase was 12.3% (from R$ 4.8973 to R$ 5.5013, based on the Ptax). Following the runoff election alone, the increase reached 9.2%. In spot market closing figures, the dollar finished at R$ 5.5087 on Friday, November 6, its highest closing value since December 30, 2025. So did the real "lose everything" on the year? In nominal terms, yes. Adjusted for inflation, the answer is different.
Why Doesn't the Same R$ 5.50 Hold the Same Value in December and November?
This is the core of the economist's argument. When Brazilian inflation runs higher than U.S. inflation and the exchange rate remains flat, the real becomes more expensive in real terms: each real buys less domestically, but continues to buy the same amount of dollars. For the "real" exchange rate to stay stable, the dollar needs to rise roughly by the difference between the two inflation rates each year.
Our estimate for the 2026 math: the Focus report projects the IPCA at 4.92% for the year, and the Copom minutes cite 5.2%. If U.S. inflation remains near 3% (the Fed only states that it stays above the 2% target), the spread is about 2 percentage points. With the nominal exchange rate stable between December and November, the real would finish 2026 about 2% stronger in real terms than it began, even with the dollar back at R$ 5.50. To return the real exchange rate to the level of late 2025, the dollar would need to reach roughly R$ 5.61 (R$ 5.5024 × 1.05 ÷ 1.03). Readers who want to track inflation month by month can recalculate this using the real inflation vs. IPCA tracker.
In other words: the past few weeks' surge removed the exaggeration seen in May, but it did not make the real "cheap" by the yardstick of inflation. That leads to the next question: if the real was so strong, what kept it afloat?
What Supported the Real, and Why Is That Support Shrinking?
The economist attributes the periods of a strong real to the interest rate differential, and the year's news coverage confirms this. At its peak in May, a Nomad specialist cited commercial inflows—boosted by oil still trading above $110 a barrel—and financial flows driven by a high interest rate spread. The problem is that this spread has narrowed on both fronts:
| Rate | Early 2026 | Today | What Changed |
|---|---|---|---|
| Selic | 15.00% | 13.75% | five 0.25-point cuts and a pause on 11/4 |
| Fed (range ceiling) | 3.75% | 4.00% | hike in September, hold on 10/28 |
| Spread (our calculation) | 11.25 pp | 9.75 pp | 1.5 points less premium for the real |
On the domestic front, Copom held the Selic rate at 13.75% a year by unanimous vote, interrupting a sequence of five consecutive 0.25-point cuts. Abroad, the Fed kept rates unchanged on October 28, but with two votes calling for a hike; one analytical firm notes that these two dissenting votes show parts of the Fed are already advocating for renewed tightening, increasing the odds of a rate increase at the next meeting. Add to this strong U.S. employment data, which drove the dollar higher worldwide on Friday, alongside caution regarding the new administration's economic policy following the runoff election. Factor in also the downgrade of Brazilian assets by foreign firms, which we covered in the report on Citigroup and BCA Research, and the overall picture points to a smaller premium for investors bringing dollars into Brazil.
This is precisely the mechanism described in the video: high interest rates support the currency while compensating for risk. When that cushion shrinks, a currency that remained expensive for too long is the first to correct.
What Does This Change for Your Portfolio?
Investors who bought dollars, BDRs, or international ETFs below R$ 5 have seen their positions gain about 12% on currency moves alone since May. Those with no overseas exposure missed the year's cheapest window, but inflation math shows the dollar at R$ 5.50 is still not expensive. In fixed income, the Selic rate held at 13.75% and inflation running above the target ceiling keep post-fixed bonds and IPCA+-linked debt paying well. For REIT-style funds (FIIs) and domestic equities, a weaker currency adds to inflation pressure and pushes back new interest rate cuts.
Copom's pause was intentional: according to the statement, headline inflation and core measures have accelerated and sit above the target ceiling, inflation expectations have drifted further from the target, and the dollar was among the factors cited. This reinforces the thesis to prioritize fixed income with high rates for longer. For brick-and-mortar real estate funds (FIIs), which require falling interest rates to drive unit price appreciation, the news is negative. For IPCA-indexed paper funds, slightly higher inflation strengthens yields.
Three Follow-Up Questions
Is it time to buy dollars? The video provides no target price, and no one consistently times short-term exchange rates. What the inflation math demonstrates is that the dollar below R$ 5 in May was an outlier. Buying gradually for diversification rather than as a speculative bet remains the least risky path. The dollar page with quotes and fair value helps illustrate where the exchange rate stands relative to this benchmark.
Can the dollar still rise? It can, if the Fed resumes rate hikes in December and the spread narrows further. The counterpoint is that, by the measure of inflation, the real has not yet returned to late-2025 levels, meaning part of the recent rise would simply be price adjustment rather than panic.
What if the real strengthens again? That would require a trigger: U.S. interest rates turning downward again, domestic fiscal relief, or a fresh wave of inflows into emerging markets. In that scenario, investors holding dollar-denominated assets lose in real terms. That is the flip side of diversification, which is why it should involve a portion of a portfolio, not the entirety.
- The Selic at 13.75% still pays nearly 10 points above U.S. rates, a high premium by global standards
- Based on inflation in both countries, the real is not cheap, which limits room for a surge driven purely by "price correction"
- The interest rate differential shrank over the year and could shrink further if the Fed hikes rates in December
- Inflation above the target ceiling and uncertainty surrounding economic policy strip the real of the support it enjoyed in the first half of the year
