The iShares MSCI Brazil Capped ETF plunged 18% to $32.10 in morning action Thursday as the country’s opposition lawmakers called for President Michel Temer to resign after a bribery allegation.

Brazilian newspaper O Globo reported Wednesday that Temer encouraged a top businessman to buy the silence of a jailed former congressional leader, and the report has threatened to spark a new bout of political turmoil, a Wall Street Journal story said.