Petrobras, the Brazilian oil giant, is hoping to finally release audited financial results for the fourth quarter after U.S. markets close on Wednesday, including an estimate of how much has been stripped out of the company by years of alleged fraud.

The state-controlled oil company is engulfed in what's probably the largest financial scandal in Brazil's history—a high bar, given the country's record of corruption. And Wednesday's earnings report has big implications for investors and maybe even the future course of the world's seventh-biggest economy.