U.S. stocks opened mixed

U.S. stocks ended Tuesday's session to the downside as oil prices declined and Wall Street factored in a near-term rate increase.

The European Union has ruled against Apple ( ) and its tax arrangement with Ireland. The EU says Ireland gave Apple illegel tax breaks and must collect on those. The clawback could be between $200 million to $19 billion U.S. dollars. The Irish government says it will challenge the ruling as has the U.S. Treasury Department. Hershey ( ) shares are lower after Mondelez pulled its offer to merge with the company. This puts an end to a months long takeover attempt that would have created the world's largest candy company. Hershey rebuffed a new bid from Mondelez last week, according to the Wall Street Journal. Two groups are suing Valeant Pharmaceuticals ( ). They claim the company's relationship with specialty mail-order pharmacy Philidor Rx Services was illegal and allowed Valeant to overcharge and wrong charge for prescriptions.

U.S. stocks staged a post-Yellen rally on Monday, buoyed by comments from the central bank Chair last week, saying the case for an interest rate increase 'has strengthened in recent months,' a sign of economic strength.

Oil made its way to $49 a barrel today, no thanks to high output from Middle East OPEC members and a stronger U.S. dollar. Also a factor, profit taking in oil and worries about a U.S. interest rate hike rattling an already nervous market. Swiss drug maker Roche

U.S. stocks were flat Monday, as investors continued to digest comments on interest rates from Federal Reserve Chair Janet Yellen on Friday. Yellen said the case for a hike has 'strengthened in recent months.' Investors now await Friday's August jobs report.

Stocks added to gains after Federal Reserve Chair Janet Yellen made the case for another rate hike. Yellen's confidence in the U.S. economy soothed investors' fears over earlier data that showed weaker growth over the second quarter.

The Fed heads are gathering in Jackson Hole, Wyoming. In recent weeks a few members of the Fed, citing the stronger labor market and other upbeat economic signals, have come out in favor of a rate hike sooner rather than later. The Federal Reserve does meet in September and some think a rate hike could come then. Federal Reserve Chair Janet Yellen will give a much anticipated speech tomorrow. 4 ex-employees of Hewlett Packard

U.S. stocks moved slightly lower on Thursday as investors anxiously awaited remarks from Federal Reserve Chair Janet Yellen on Friday.

Federal Reserve Chair Janet Yellen is expected to keep investors happy in her closely watched speech in Jackson Hole, Wyo. on Friday.