Citigroup (C) shares are up 3.1% this morning, as investors cheered the bank’s strength in some surprising areas. Citigroup posted $1.06 of adjusted earnings per share, 10 cents ahead of analysts’ expectations. Revenue of $19.4 billion beat expectations for $18.7 billion. Citi’s unadjusted earnings were messier, as the bank wrote down the value of its [...]