Petrobras is trading at $23.39 (+8.04%) after a second oil-bearing interval was reported at the Morpho well off Amapá. - Reports link the discovery to Friday’s record market value and market-cap gain. - The well is in the frontier Foz do Amazonas basin; drilling and evaluation continue, and commercial potential is not yet established. - Market context is mixed: Brent fell 0.39% on October 5, making a broad-market or oil-price explanation less evident.