📊 B3 Closing & Market Gamma (GEX) Analytical Mapping — 06/16/2026

📈 1. Market Summary (Closing: 06/16/2026)

The Ibovespa registered a trading session of technical stabilization and low intraday volatility compared to the stress of the previous day, closing the session slightly up by 0.28%, at 170,892.40 points. The index spent most of the day orbiting the waterline, testing the immediate resistance of 171k at the maximum (171,120 points) and successfully defending the 170k region at the minimums.

Financial volume was more contained, totaling BRL 18.7 billion, reflecting the classic "wait and see" posture of major funds and foreign investors ahead of monetary policy decisions. The marginal relief in the exchange rate and the stabilization of oil abroad helped stem the bleeding from the previous session.

📊 Closing Panel

• Ibovespa (IBOV): ▲ +0.28% (170,892.40 points)
• Commercial Dollar: ▼ -0.35% (quoted at BRL 5.0152 — cooling off after flirting with higher levels, as investors dismantled very short-term FX hedges).
• DI January 2031 (Long Contract): ▼ 13.92% (slight technical retreat in the future yield curve after yesterday's Focus Bulletin stress).
• Brent Crude: ▲ +0.65% (stabilized in the range of USD 84.75 per barrel, finding support after a nearly 5% drop the day before).

🚀 Dynamics of Main Assets

• Petrobras (PETR4 & PETR3): ▲ +0.81% (BRL 37.46) — Attempted a partial technical rebound after yesterday's 5.15% drop. The stabilization of Brent and the inflow of tactical buying flow focusing on the short-term chart support sustained the asset.
• Vale (VALE3): ▼ -0.45% (BRL 65.10) — Realized marginal profits after yesterday's strong rise (+2.51%), following a slight accommodation of iron ore futures contracts in Dalian overnight.
• Financial Sector: Acted as the main vector of support for the spot index. Itaú Unibanco (ITUB4) rose ▲ +0.67% (BRL 34.65) and Bradesco (BBDC4) advanced ▲ +0.85%, driven by the compression of premiums in institutional ATM option structures.
• Retail and Consumption: Traded stable with a slight upward bias, reacting to the marginal closing of long DIs. Lojas Renner (LREN3) rose ▲ +1.10% and Natura (NTCO3) advanced ▲ +0.54%.

🔍 2. Market Gamma (GEX) Analytical Mapping — June Series

With the Ibovespa closing at 170,892 points, the derivatives ecosystem remained parked in regulated transition territory, reducing the speed of forced execution algorithms while the market awaits Super Wednesday.

📐 Structural GEX Overview (IBOV & Main Assets)

Classic Market Gamma mathematical model:

The market aggregate recorded a marginal closing of very short-term speculative positions, keeping the Net GEX negative at -BRL 0.74 billion (Attenuated Short Gamma Regime).

                    TRANSITION ZONE (ATTENUATED SHORT GAMMA)
 ◄───────────────────────────────■───────────────────────○───────────────────────►
 168.0k                       170.8k                  171.5k                    173.0k
 [Major Put Wall]          [Current Price]         [Gamma Flip Point]     [Upper Ceiling]

🚨 1. Market Regime: Deleveraging Short Gamma

The market remains below the Gamma Flip Point (171,500 points), which theoretically keeps the Short Gamma regime active. However, today's intraday behavior showed a strong volatility deleveraging. Market Makers reduced the size of their mechanical protection lots (Delta Hedging), which prevented sudden accelerations and kept the index trapped in a narrow trading range.

🎯 2. Open Interest Concentration (Triggers for Super Wednesday)

• Flip Point Magnetism: The 171,500 points region acts as a strong technical attraction magnet. If tomorrow's Copom and FOMC statements are in line with expectations, the index should break this barrier, instantly migrating to the Long Gamma regime and crushing the premiums of dry June options.
• The Weekly Protection Put Wall: The 168,000 points line is consolidated as the definitive wall of institutional open positions. There is a massive volume of defensive orders accumulated in this range, indicating that any hawkish surprise on Super Wednesday will trigger aggressive treasury defenses to prevent the collapse of support.

📊 Skew and GEX Breakdown by Leading Assets

A. VALE3 (Ref Price: BRL 65.10)

• Total GEX: +BRL 440 million (Dominant Long Gamma).
• Positioning Analysis: The stock defended the broken strike of BRL 65.00, keeping Market Makers in a position of mechanical support via spot asset purchases. Implied volatility Skew remains stable, exhibiting a symmetrical curve typical of pre-expiration consolidation.

B. PETR4 (Ref Price: BRL 37.46)

• Total GEX: -BRL 510 million (Reduced Short Gamma).
• Positioning Analysis: Today's rebound attenuated the imminent risk of Delta Bleed. Institutional desks took advantage of Brent's stabilization to buy back OTM written positions. The main short-term protection Put Wall remains fixed at the BRL 36.50 line, which should serve as a floor for the June expiration.

C. ITUB4 (Ref Price: BRL 34.65)

• Total GEX: +BRL 140 million (Return to Positive Territory).
• Positioning Analysis: The asset recovered the magnetic level of BRL 34.50, reactivating the protective "Pinning" effect by Gamma. The mechanical behavior expected for tomorrow is strong lateral oscillation around this strike, wiping out the value of expiring options.

🛠️ 3. Structural Recommendations and Portfolio Management

1. Pre-Super Wednesday Risk Management: With the Ibovespa's structural GEX close to the neutrality zone (-BRL 0.74B), the post-rate announcement direction will be highly directional. It is recommended to lock in profits from volatility-selling structures of the current series and strictly focus strategic positioning on the July series.
2. Take Advantage of Distortions in the Oil Sector: The BRL 36.50 region in PETR4 proved to be a barrier of strong institutional buying flow. Structures like Jade Lizards or writing long Puts (July series) mounted below this line offer an excellent statistical asymmetry if the market suffers marginal noise from tomorrow's announcement.