Petrobras US premarket falls over 20%, Itaú Unibanco down over 27%

The scale of these premarket moves, and the fact that they hit both a state-linked energy major and a large private bank simultaneously, points to a Brazil-wide or policy-driven shock rather than anything company-specific. That breadth matters because it suggests foreign holders of Brazilian equity are repricing country exposure, not individual names. The item gives no cause, so the open question is what catalyst surfaces once regular trading begins and whether the selling is concentrated in US-listed shares or confirmed in local markets.