**Brazil's Q3 2026 GDP growth faces headwinds from persistently tight monetary policy, with the Selic rate near 13.75% curbing credit-sensitive spending and fixed investment amid above-target inflation expectations.** High-frequency indicators and analyst nowcasts point to sequential contraction or near-flat output after Q2's 0.5% QoQ expansion, reflecting negative carry-over, cooling household demand, and softer labor market momentum. Recent Focus survey median forecasts for full-year 2026 growth edged down to 1.85%, aligning with private-sector estimates of 0–0.1% QoQ for the quarter. Robust September trade surpluses provide limited offset, while fiscal uncertainty and potential El Niño effects add downside risks. Market-implied odds reflect this contested slowdown, with closely matched probabilities across negative and low-positive bins underscoring sensitivity to incoming activity data ahead of the official release.