Managers overseeing Citigroup's European trading hub had hundreds of blind spots, allowing for potentially abusive transactions to go unnoticed in the almost 900,000 trades processed every day at the bank's Canary Wharf headquarters, according to a report from the UK Financial Conduct Authority (FCA). The shortcomings carried on for at least two years, enough time for the traders to generate about £2.6 billion ($3.1 billion) in revenue, the report shows.
