Citi reported a $9.83 billion net loss for Q4 2007, driven by $18.1 billion in write-downs on subprime exposures and a $4.1 billion increase in credit costs for US consumer loans. For the full year, Citi earned $3.62 billion in net income on $81.7 billion in revenues. While most business segments saw strong revenue growth, losses were concentrated in fixed income markets and US consumer lending due to deteriorating credit quality. Citi outlined steps to strengthen its capital position and improve risk management in response to the poor results.