A 24-hour turnaround. Yesterday, Iran announced the closure of the Strait of Hormuz, and the market priced in a supply shock. Today, a draft agreement between the U.S. and Iran has emerged that proposes reopening the strait in 30 days and lifting sanctions on Iranian oil. Brent crude reacted by pulling back to around $87. This piece is a follow-up to our article from yesterday—and the central takeaway is that the news shifts the tone, but remains a proposal rather than a done deal.
The day after an announcement that rattled the energy markets, the script has flipped. Instead of an escalation in the Hormuz blockade, a draft agreement mediated by the United States has surfaced, pointing in the opposite direction: reopening the corridor through which roughly 20% of the world’s oil passes and returning Iranian barrels to the global market. Brent crude, which yesterday carried a war premium, shed part of that premium and pulled back closer to $87.
The market reading is straightforward: if the oil starts flowing again and additional Iranian supply enters the market, the supply-and-demand equation loosens and prices ease. But the key word is if. A draft is not a signed agreement, and proposals to lift sanctions typically come with plenty of conditions and timelines. Investors who react as if the risk has already cleared face the opposite hazard of yesterday—ending up poorly positioned if negotiations stall.
What the Draft Says (and What It Doesn't Guarantee Yet)
According to reports, the proposal rests on three pillars. First, the reopening of the Strait of Hormuz within 30 days, ending the blockade threat that triggered yesterday's stress. Second, the lifting of sanctions on Iranian oil, which would bring a meaningful volume of barrels back to the market and put more structural downward pressure on prices. Third, the participation of the U.S. as mediator, lending diplomatic weight to the negotiation.
It's a proposal—not a guarantee. All of this remains in the draft stage. Geopolitical negotiations involving Iran and the U.S. have a history of steps forward and backward, and a 30-day window is plenty of time for talks to sour. Brent at $87 already prices in some of this optimism; if the deal derails, the risk premium will return quickly. Do not treat an unconfirmed proposal as your baseline scenario.
What This Means for the Brazilian Investor
Cheaper oil reverses the transmission channels we outlined yesterday. Where the Hormuz closure pushed the dollar, inflation, and interest rates higher, the reopening tends to ease the pressure across the exact same points. It is worth breaking down each segment of the model portfolio.
U.S. Dollar (25% of Portfolio)
This is the most sensitive channel. Falling oil prices relieve global inflationary pressure and reduce the urgency for high interest rates in the U.S. for longer. With the Fed under less pressure and risk sentiment improving, the dollar tends to weaken—the reverse of yesterday's safe-haven move. For anyone holding 25% of their portfolio in currency exposure, this matters: the position that provided protection during the panic could give back some of its gains if the relief materializes. This is not a reason to liquidate your dollar holdings—it is a realization that a protective hedge yields less in a de-escalation scenario.
Inflation and the IPCA
Cheaper oil is a disinflationary force. Freight, fuel, and supply chain costs decline, and the IPCA, Brazil's official inflation index, gets some breathing room. In theory, this would open space for a less hawkish Central Bank. But the same caution applies here: do not price in Selic cuts based on an unconfirmed proposal. Relief on inflation only materializes if oil prices actually remain lower in a sustained way—and that depends on the deal moving from paper to reality.
Paper FIIs (CRIs)
Paper funds hold real estate receivables certificates (CRIs) indexed to IPCA+ and CDI+. If inflation and the Selic rate stabilize at more moderate levels, the yields on new CRIs tend to edge lower, and the dividend flow tied to inflation may cool at the margin. This is an indirect and gradual impact, not a shock. On the other hand, lower real interest rates improve the mark-to-market valuation of existing portfolios. The net effect is nuanced and depends on each fund's specific composition—there is no immediate trigger to alter your position.
Brick and Logistics FIIs
Here the effect is marginally positive. Cheaper oil means lower road freight costs, which reduces operating expenses for tenants in logistics warehouses. Lower costs support the financial health of tenants, favoring occupancy rates and tending to reduce default risk. This is not a standalone value unlock, but it is a tailwind for logistics funds—a category that faced double exposure yesterday and now finds some relief on the cost side.
Ibovespa
The Brazilian stock market is splitting again, now in reverse. The drop in oil prices weighs on Petrobras, which carries significant weight in the index as its revenue is tied to international crude prices. Conversely, companies that use petroleum derivatives as inputs (industrials, transportation, consumer goods) get a margin boost from lower costs. In an index where oil companies hold a large weighting, the decline in Brent can weigh on the short-term aggregate, despite the sector-specific relief on the other side.
What to Do Now
The Verdict: The news improves the tone, but does not justify shifting allocation based on an unconfirmed proposal
Do not react to the headline. Brent at $87 already prices in optimism, and the deal is still just a draft. Changing allocations based on a proposal that could derail in 30 days swaps discipline for an impulsive reaction—the mirror image of panic-buying yesterday.
Monitor the 30-day window. If the agreement is actually finalized and oil prices settle at lower levels, then it will be worth reassessing dollar exposure (which tends to soften in a de-escalation scenario) and the stance on paper FIIs (where CRI yields face slight pressure). Before confirmation, it is too early.
Maintain diversification. Geopolitical risk remains elevated—today's draft does not erase yesterday's tension. The combination of the dollar, real estate, cash, and FIIs continues to shield the portfolio through both escalation and de-escalation, without requiring you to guess which scenario wins out.
What to watch: the signing (or failure) of the agreement, Brent's trajectory over the coming weeks, the reaction of the dollar and short-term domestic interest rates (DI), and any sign that the sanctions relief has moved off paper. Confirmation, not the announcement, is what changes the thesis.
Sources
The data and geopolitical backdrop reflect information gathered through June 12, 2026, and are subject to rapid developments. The strategic analysis and portfolio implications reflect Rico aos Poucos's editorial perspective and do not constitute investment recommendations.
