NEW YORK (AP) Brookfield Office Properties is buying the 15-story building that houses the New York Mercantile Exchange's headquarters in a deal worth $200 million.

CME Group, which operates the exchange, said Tuesday that it will lease back most of the lower half of the downtown Manhattan building for 15 years, including the trading floor and related office and support space.

Brookfield said in a statement it plans to lease the top half of the building, including the rooftop overlooking the Statue of Liberty.

The Chicago-based CME Group operates exchanges for trading futures in Chicago, Kansas City, Mo., and New York.

Shares of CME Group Inc. fell 44 cents to $81.85 in trading Tuesday. Brookfield Office Properties Inc. shares were flat.