Bloomberg reported, citing Bank of America as the source, global financial firms’ estimated $139 billion or more exposure to Glencore may draw more scrutiny as regulatory stress tests approach after the commodity giant’s stock plunge this year.

Bloomberg said, according to BofA analysts, bank shareholders and regulators may be concerned that Glencore’s debt and trade finance deals, of which a “significant majority” are unsecured, will reveal higher than expected risk and require more capital once the lenders are put through U.S. and UK stress tests.

Bloomberg notes that loans to the industry have come under scrutiny as the prices of oil, copper and other commodities fell to their lowest levels in 16 years amid weakening demand from China.