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Crude oil prices continued to show a lack of direction Tuesday morning, falling sharply ahead of testimony from Fed Chair Janet Yellen.
The Fed boss will deliver her assessment of the sluggish economy and outlook on interest rates before Congress mid-morning.
The looming UK 'Brexit' vote has traders on the sidelines as well.
Although a number of polls now show the British will vote to stay with the European Union, markets remain somewhat cautious.
U.S. crude oil for August was down 91 cents at $48.46 a barrel.
