Petrobras has warned its shareholders that the coronavirus pandemic could leave a permanent mark on the global economy, including on consumer behaviors, as it reported a first-quarter loss and massive writeoffs on assets that have stopped being economical. The company booked a $9.7 billion net loss for the first quarter, down from a profit of $1.98 billion a quarter earlier, mostly on an impairment charge of $13.4 billion related to shallow- and deepwater assets. “The assets that had their values adjusted are mostly oil fields in shallow and deep waters, whose investment decision was made in the past and based on more optimistic expectations for long-term prices,” Petrobras said. “We are not surprised by its devaluation in a more challenging environment.” The company noted that it has yet to feel the pandemic’s economic effects on its financial results, which it expects to happen in the current and subsequent quarters. […]