New York-based StoneX Group buys the company that dates from 1914 and helped start the Chicago Mercantile Exchange.

CHICAGO (AP) _ Grain futures were mostly lower Tuesday on the Chicago Board of Trade. May. corn was unchanged at $4.81 a bushel. May. wheat was off 1.75 cents at $5.42 a bushel. May. oats fell by 4.5 ...