NEW YORK (AP) -- Shares of some top chemicals companies are up at 1 p.m.:
Dow Chemical Co. rose $.24 or .7 percent, to $34.25.
DuPont Co. rose $.95 or 1.8 percent, to $53.63.
Over the past few years, Citigroup Inc has been grappling with an unusual problem - how to incur more U.S. taxes. …