📊 B3 Closing & Market Gamma (GEX) Analytical Mapping — 06/12/2026

📈 1. Market Summary (Closing: 06/12/2026)

The Ibovespa consolidated its recovery trajectory this Friday, closing up 0.88%, at 173,006.21 points, breaking through and sustaining itself above the psychological barrier of 172k and testing the stability of 173k. With this movement, the Brazilian stock exchange significantly mitigated the losses accumulated in the first half of the week, driven by a global environment of lower risk aversion.

The main supporting vector continued to be the diplomatic developments in the Middle East, which removed the immediate risk of a shock in energy supply chains. Additionally, higher-than-expected domestic economic activity data corroborated local corporate resilience, attracting short covering flows in the final stretch of institutional portfolio adjustments.

📊 Closing Panel

• Ibovespa (IBOV): ▲ +0.88% (173,006.21 points)
• Commercial Dollar: ▼ -0.82% (quoted at R$ 5.0582 — extending the previous day's relief trajectory).
• DI January 2031 (Long Contract): ▼ 13.72% (significant curve steepening tracking the drop in country risk).
• Brent Crude Oil: ▲ +0.41% (stabilized in the US$ 92.58 per barrel range, finding technical support after yesterday's sharp drop).

🚀 Key Assets Dynamics

• Vale (VALE3): ▲ +1.45% (R$ 63.79) — Advanced consistently, supported by the recovery of iron ore futures contracts in Asia and foreign inflow via ADRs.
• Petrobras (PETR4): ▲ +0.72% (R$ 39.18) — Followed a firm trajectory of institutional accumulation, benefiting from the stabilization of Brent and the favorable prospect of extraordinary dividend distribution at the end of the quarter.
• Financial Sector (ITUB4 and BBDC4): Maintained the buying bias of the previous day, operating as important liquidity volume anchors for the index, sustaining the day's highs.
• Steel and Metallurgy (GGBR4 and CSNA3): Recorded a tactical weekend rally, with investors dismantling bear put spreads after the relief in long-term future interest rates.

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

The consolidation of the Ibovespa above 173 thousand points altered the correlation of forces in the derivatives market, activating mechanical triggers that severely reduced intraday volatility on the eve of the June options expiration.

📐 Structural GEX Overview (IBOV & Key Assets)

Classical Market Gamma mathematical model:

With the closing at 173k, the market formally broke the inertia of the neutral point observed yesterday, registering a Positive Net GEX of +R$ 1.42 billion (Consolidated Long Gamma Regime).

                    BUFFER ZONE (LONG GAMMA)
 ◄───────────────────────────────○───────────────────────■───────────────────────►
 168.5k                       171.5k                  173.0k                    174.5k
 [Protective Support]      [Old Flip Point]       [Current Price]           [Calls Ceiling]

🚨 1. Market Regime: Active Long Gamma (Positive GEX)

By consolidating above the Gamma Flip Point (171,500 points), the Ibovespa entered the zone where the action of Market Makers begins to mitigate sharp oscillations. Under the force of Long Gamma, institutional algorithms perform rebalances by buying on intraday dips and selling on highs. This behavior generated the crushing of implied volatility observed in today's session (IV Crush).

🎯 2. Open Interest Concentration (Pinning Zones for Expiration)

• "Pinning" Effect Activated: The core between 172,500 and 173,500 points concentrates the highest volume of options Open Interest expiring in the coming days. The expected behavior for early next week is a strong magnetism in this range, as treasuries seek to hold the index to decimate the extrinsic value (Theta) of the remaining options.
• Statistical Support Cushion: The region of the old Flip Point at 171,500 points now acts as a structural safe harbor of protection against new rounds of technical realization.
• Rigid Resistance: The ceiling of institutional short Calls positions at the 174,500 points line remains intact and unlikely to be breached without a new and massive international driver.

📊 Skew and GEX Breakdown by Leading Assets

A. VALE3 (Ref Price: R$ 63.79)

• Total GEX: +R$ 410 million (Dominant Long Gamma).
• Positioning Analysis: The stock approached the psychological strike of R$ 64.00. The Market Makers are heavily long on equities in the spot market to hedge the Calls ceiling positions. The volatility Skew flattened, confirming the disappearance of the panic premium for OTM Puts.

B. PETR4 (Ref Price: R$ 39.18)

• Total GEX: +R$ 780 million (Robust Long Gamma).
• Positioning Analysis: With the asset consolidated above R$ 39.00, institutional short positions strategically retreated to the July series. There is a gigantic technical barrier and volume anchoring at R$ 39.50, which should function as the maximum attraction point for the expiration close.

C. ITUB4 (Ref Price: R$ 34.55)

• Total GEX: +R$ 320 million (Stability Regime).
• Positioning Analysis: The asset nailed the price exactly on the main accumulation line of Calls and Puts for the month (R$ 34.50). The classic mechanical locking phenomenon by Gamma occurred perfectly throughout the afternoon, dehydrating the premium of dry option buyers on both ends.

🛠️ 3. Structural Recommendations and Portfolio Management

1. Leverage the IV Crush for Structured Assembly in the July Series: The sharp decline in implied volatility opens a statistically favorable window for long volatility strategies or debit structured operations (e.g., bull call spreads) in the new July series, whose premiums are clean from the week's stress.
2. Efficient Rollover: With the market under a Long Gamma regime and locked oscillations, the weekend and Monday's opening offer the ideal scenario for rolling over flow structures (such as Jade Lizards or covered calls) without the risk of forced executions due to violent Delta variation.