Citigroup Global Markets in Asia overlooked a system failure within its dark pool and failed to hand out guidelines to clients.
Armando Diaz returned to Citi in 2016 after a stint at Millennium Management as global head of execution.
SPIRE platform was launched in May last year by BNP Paribas, Citigroup, Credit Suisse and JP Morgan.
Goldman Sachs saw the biggest fall in bond trading profits among rivals, as low volatility hits fourth quarter trading activity.
Citi failed to correctly report LEIs for tens of thousands of swap transactions.
Deal to acquire Citi’s fixed income indices and the Yield Book announced in May this year has closed.
Sabrina Wilson has more than 20 years’ experience in futures and options, clearing and electronic trading.
Citigroup’s restructure saw the headcount reduced by 40,000 over the past four years.
Citi sees equities trading sales increase 10% in the first quarter this year, as derivatives and fixed income also surge.
The SEC alleges Citi had overcharged at least 60,000 investment advisory clients.