NEW YORK (TheStreet) -- Shares of Citigroup were falling 0.8% to $52.75 after-hours Thursday after revising its third-quarter earnings. The bank announced that it lowered its third-quarter earnings to a net income of $2.84 billion, or 88 cents a share, down from the net income of $3.44 billion, or $1.07 a share, it reported on Oct.