Jan. 24 (Bloomberg) — Paulson & Co., the $35.9 billion hedge fund run by John Paulson, told clients that it made more than $1 billion on its Citigroup Inc. investment in the last 18 months. Citigroup was the fund’s most profitable bank holding last year, Paulson said in a letter to clients this month. Bloomberg’s Julie Hyman reports. (Source: Bloomberg)
