Financial services giant Credit Suisse is in talks with Chicago-based Mesirow Financial Holdings about buying its hedge fund business for $11 billion. Zurich, Switzerland-based Credit Suisse, which manages around $15 billion under its own hedge fund unit, is seeking to purchase MesirowÔÇÖs Advanced Strategies division, which places client money in hedge funds. It currently has around $11 billion in assets. The Chicago-based firm also has holdings in real estate, private equity funds and commodities. The hedge fund unit makes up around a third of its total assets.