The Ibovespa rose 2.4% to close at 177,548 on Wednesday, supported by strong corporate earnings.
Vale advanced 4% after reporting that iron ore production rose 0.8% year-on-year in the April-June period, marking its strongest second-quarter output since 2018.
Bradesco BBI reiterated its Buy rating after the company's sales volumes exceeded expectations.
WEG jumped 10% after reporting healthy operating margins and return on invested capital in the second quarter, despite lower year-on-year EBITDA and revenue.
Revenue from international markets increased 14.7% in US dollar terms, although the company said the appreciation of the Brazilian real weighed on reported revenue in local currency.
Petrobras rose 2.2% as oil prices climbed amid escalating tensions in the Middle East. On the trade front, a 25% US tariff on a range of Brazilian products took effect on Wednesday.
However, key exports including beef, coffee, rare earths, energy products, aircraft, and aircraft parts remain exempt.