Citigroup has asked its 600 US employees, who are eligible to work remotely, to return to office full time, it said Friday as regulatory requirements make it hard for Wall Street banks to allow offsite work for roles such as trading. Regulators had eased some of the stringent requirements to allow traders the flexibility of remote work during the pandemic. But in the coming weeks, the primary watchdog for US brokerage firms and exchange markets, the Financial Industry Regulatory Authority (FINRA), is set to ...