A sharp decline in international oil prices, driven by a surge in Saudi exports and diplomatic optimism, was detailed in reports from consulting firm Kpler and analysts at BTG Pactual. This significant drop in energy commodities reduces global inflationary pressures, which directly reflected on Brazil's fixed-income market by triggering a broad decline in yields on Tesouro Direto government bonds.
Why Did Oil Prices Fall Internationally?
A substantial increase in Saudi Arabia's supply and optimism surrounding diplomatic negotiations between the United States and Iran were the primary drivers behind the drop in oil prices. According to Kpler data released to the market, Saudi Arabia's crude oil exports surpassed the 4 million barrels per day mark in September. This volume represents a strong recovery from the 2.4 million barrels per day recorded in August, which had been the country's lowest export level since at least 2013.
Additionally, data from Reuters indicates that state-owned Saudi Aramco loaded approximately 14 million barrels of crude oil onto seven supertankers. This movement occurred after the kingdom increased shipments from its export terminals on the Gulf, reestablishing flows that had been disrupted by an attack on the East-West pipeline linking to the Red Sea. Concurrently, data from the U.S. Central Command (Centcom) confirmed that the volume of oil and cargo transported through the Strait of Hormuz over the past two weeks was the highest recorded in the last six months.
On the diplomatic front, BTG Pactual analysts highlighted that the market reacted with optimism to the possibility of talks between U.S. President Donald Trump and leaders from the Gulf and Iran on the sidelines of the 81st United Nations General Assembly in New York. This scenario reduced the geopolitical risk premium in the Middle East. As a direct result of these supply and diplomatic forces, Brent crude for November closed down 3.40% at $100.34 a barrel on London's Intercontinental Exchange (ICE), while WTI fell 3.86% to settle at $92.37 a barrel on the Nymex.
How Does the Drop in Oil Affect Tesouro Direto in Brazil?
The decline in commodity prices eases global and domestic inflation projections, prompting the fourth consecutive drop in Tesouro Direto government bond yields. With cheaper oil, pressure on fuel prices decreases, helping moderate short-term inflation projections in Brazil. This relief paved the way for a flattening of the forward interest rate curves in the local market.
According to official Tesouro Direto data reported by InfoMoney, yields on fixed-rate and inflation-linked bonds declined consistently. The Tesouro Prefixado maturing in 2032, for example, fell from 14.18% per year at the previous close to 14.10%. The Prefixado with Semiannual Interest maturing in 2037 dropped from 14.23% to 14.15%, while the Prefixado maturing in 2029 moved from 13.85% to 13.79%.
In IPCA-linked bonds, the downward trend was also clear. The Tesouro IPCA+ maturing in 2050 recorded the day's largest decline, falling from 7.19% to 7.17%. The IPCA+ maturing in 2032 slipped from 7.60% to 7.57%, and the IPCA+ with Semiannual Interest maturing in 2060 went from 7.20% to 7.18%. This easing of domestic interest rates was reinforced by the Central Bank's Focus Report, which showed a downward revision in the consensus expectation for the Selic rate at the end of 2026, now projected at 13.50%, signaling that the market expects another rate cut later this year.
| Government Bond | Previous Yield (%) | New Yield (%) |
|---|---|---|
| Tesouro Prefixado 2032 | 14.10% | 14.10% |
| Tesouro Prefixado 2037 (Semiannual Interest) | 14.23% | 14.15% |
| Tesouro Prefixado 2029 | 13.85% | 13.79% |
| Tesouro IPCA+ 2050 | 7.19% | 7.17% |
| Tesouro IPCA+ 2032 | 7.60% | 7.57% |
| Tesouro IPCA+ 2060 (Semiannual Interest) | 7.20% | 7.18% |
Which Brazilian Stocks Gain or Lose from This Move?
Oil companies face direct pressure from the drop in crude prices, while logistics and transportation sectors benefit from lower operating costs for fuel. On the Brazilian stock exchange, falling oil tends to weigh on Ibovespa heavyweight Petrobras, alongside other independent oil producers whose revenues are directly dollarized and tied to international commodity prices. On the other hand, airlines, transport companies, and retailers reliant on complex logistics networks gain breathing room with the prospect of cheaper fuel.
However, the oil and gas sector also features important corporate developments on the long-term radar. A report published by Goldman Sachs pointed to a potential "renaissance" for oil in Venezuela. The U.S. bank estimates that recent agreements signed by international oil companies in the neighboring country could boost hydrocarbon production to about 1.9 million barrels per day by 2030.
This movement has already begun generating practical partnerships for Brazilian companies. Halliburton announced the signing of memorandums of understanding with Brazil's Eneva (ENEV3) and WESCA to support energy development and identify business opportunities in Venezuela. In an analysis on the subject, Bradesco BBI evaluated that Eneva's demonstrated interest highlights Venezuela's growing attractiveness for investment and noted that Petrobras itself could also pursue opportunities in the region.
What Should Investors Monitor Closely in the Coming Days?
Investors should monitor developments from the UN General Assembly and speeches by Federal Reserve officials to gauge the next steps for global interest rates. Although the relief in oil brings optimism, the U.S. interest rate environment still demands caution. Chicago Federal Reserve President Austan Goolsbee stated at an event in London that the central bank needs courage to tackle inflation and will only feel comfortable supporting a rate cut when there is convincing evidence that prices are sustainably converging toward the 2% target. According to Goolsbee, the Fed currently does not face an employment problem, but rather a persistent inflation problem.
On the domestic front, alongside commodity trends and central bank decisions, the market remains attentive to the political landscape. The Nexus electoral poll showed a technical tie in a potential runoff between President Luiz Inácio Lula da Silva and Senator Flávio Bolsonaro, with the incumbent leading by just one percentage point. This political balance adds volatility to local assets, making the tracking of fiscal reforms and upcoming opinion polls essential for anyone investing in fixed income and equities.
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