Ibovespa Defies Iran Shock as Petrobras Surge Lifts B3

Monday’s session was a tale of two markets. The Ibovespa plunged to 186,638 in early trade as the full scale of Operation Epic Fury became clear — the killing of Iran’s Supreme Leader Khamenei, coordinated strikes across Iranian military installations, and the effective closure of the Strait of Hormuz through which roughly one-fifth of global oil flows daily. European markets lost 1–2%, Asian indices dropped 1–3%, and S&P 500 futures traded down more than 1% pre-market.

But Brazil’s commodity-heavy index found an unlikely lifeline. The Hormuz shutdown sent Brent crude soaring to an eight-month high of $77.85, and Petrobras — the index’s largest component — responded with a 4.6% rally that single-handedly reversed the morning’s losses. PRIO3, PetroReconcavo, Brava, and Raízen followed in lockstep, turning the energy sector into the day’s sole bright spot. B3SA3 surged 3.3% as options and derivatives volume exploded on the volatility spike.

Outside energy, the damage was broad. Itaú PN fell 1.80% as the oil-driven inflation impulse raised expectations for a more hawkish BCB stance, compressing the rate-cut narrative that had fueled the January–February rally. Rede D’Or lost 3.0% and WEG shed 1.6% after disappointing Q4 results, while Embraer dropped 2.0% ahead of its own earnings later this week. Braskem (−3.55%) and steelmakers suffered from the global demand-shock pricing.

In New York, the day was equally dramatic. The S&P 500 plunged 1.2% at the lows before staging a full recovery to close at 6,881.62 (+0.04%). The Nasdaq rebounded from −1.6% to finish at +0.36%, led by Nvidia (+2.9%) and Microsoft (+1.5%) as investors rotated into cash-rich tech names. The Dow lost 73 points (−0.15%). Defense stocks surged — Northrop Grumman +6%, Palantir +5.8% — while oil names rallied on the Hormuz disruption.

The Focus survey released Monday morning — collected before the strikes — kept the IPCA 2026 median at 3.91% and trimmed the year-end Selic forecast to 12.00%. But those numbers feel stale already. If Brent sustains above $80, domestic fuel-price adjustments become inevitable, potentially adding 30–50 bps to the inflation outlook and shelving the Copom easing thesis that had been gaining traction. The DI curve will reprice aggressively at Tuesday’s open.

The daily chart shows the index closing at 189,307 after printing a dramatic 3,472-point intraday range (190,110 high to 186,638 low). Price remains above the Ichimoku cloud, with the Tenkan-sen at 186,925, Kijun-sen at 182,220, and Senkou Span A/B at 180,426 and 174,487 respectively. The cloud continues to expand, confirming the medium-term uptrend remains structurally intact despite the geopolitical shock.

Bollinger Bands show the upper band near 189,307, the middle at approximately 185,516, and the lower band around 181,725. The close sits right at the upper band, which could act as resistance if the risk-off mood persists into Tuesday. The 200-day SMA at 150,780 is 25.5% below current price, underscoring the strength of the longer-term trend.

Momentum indicators flash caution. The MACD histogram sits at −598, deepening its negative trajectory despite the price recovery. The signal lines (5,040 and 4,442) show a widening gap that typically precedes a more meaningful pullback or consolidation. RSI reads 69.04 with a signal at 63.26 — near overbought but not yet at the extremes seen during the February peak. The divergence between the negative histogram and still-positive absolute MACD value suggests a consolidation phase rather than a trend reversal.

Iran / Hormuz → Trump has signaled the bombing campaign could last “four or five weeks,” and the IRGC has reportedly fired on three oil tankers. UBS warns a sustained Hormuz disruption could push Brent above $120/bbl. Duration is the only variable that matters for the medium-term macro outlook.

Macro Calendar → IBGE releases Q4 GDP on Tuesday (March 3), followed by producer prices (March 4), January unemployment (March 5), and industrial output (March 6). February IPCA is due March 12. But all domestic data is subordinate to the geopolitical shock.

Copom March 17-18 → The Focus survey still shows a 50 bp cut as the base case, but the probability has narrowed sharply. If Brent sustains above $80, fuel-price adjustments become inevitable, adding 30–50 bps to the inflation outlook and potentially shelving the entire easing thesis.

Earnings → Petrobras reports Q4 on March 5 — timing could not be more consequential. WEG and Rede D’Or already disappointed. Embraer reports later this week. The earnings calendar will compete with geopolitics for market attention.

Overnight → S&P 500 futures down 0.9%, Nasdaq futures off 1.2% as of Tuesday morning Asian trade. Nikkei −3.06%, Hang Seng −1.25%. European futures point to 1–2% declines. The critical question is whether Petrobras can continue to carry the index alone.

The Ibovespa’s +0.28% Monday close is a triumph of composition over conviction. Petrobras alone accounted for the green print, masking a session in which the majority of index components closed lower. The energy sector is carrying an index that had already begun showing fatigue after the 192,624 ATH rejection — and now faces a geopolitical regime change that resets the risk calculus entirely.

The bullish thesis for 2026 — foreign inflows, BRL strength, falling inflation expectations, rate cuts — has been torpedoed by two developments in one week: the IPCA-15 shock at 0.84% (vs. 0.57% consensus) and now Operation Epic Fury. If Brent sustains above $80, the DI curve reprices toward terminal rates of 16%+, the Copom March cut narrative evaporates, and the R$41.7B foreign inflow trend reverses.

Technical bias shifts to NEUTRAL from bullish. The trend structure remains constructive above the cloud, but momentum divergence (MACD histogram at −598, deepening) and the concentration of positive contribution in a single sector warrant defensive positioning. A close below 186,000 flips the bias bearish.

Duration is everything. If this mirrors the 2025 twelve-day war pattern, the damage is temporary and the underlying thesis reasserts. If Hormuz stays shut and Brent breaches $100, we are in a different macro regime. Trade accordingly.