$35 billion hedge fund Millennium Management has hired a top trader from Citigroup

Sebastian Ridd, who had been head of program trading and cash trading in the US at Citigroup, is joining giant hedge fund Millennium Management.
His departure from Citigroup, along with that of global head of cash trading Armando Diaz, represents a shift at the top of the US bank's stock trading business. 
Millennium Management, the $35.7 billion hedge fund giant, has hired a top trader away from Citigroup. 
Sebastian Ridd, head of program trading and cash trading in the US a