Key Facts

—The rule. Brazil’s securities regulator issued Resolution 245 on July 2, adding tougher checks on non-resident investors from high-risk countries.

—The timing. It landed one day after the United States sanctioned Brazilians accused of financing the PCC criminal faction.

—Who it hits. Brokers serving foreign funds must screen clients against the global watchdog’s risk lists.

—The stakes. Foreigners made up a record sixty-one percent of trading on the B3 exchange through April.