Sept. 9 Premarket Briefing: 10 Things You Should Know

NEW YORK (TheStreet) -- Here are 10 things you should know for Tuesday, Sept. 9:

1. -- U.S. stock futures traded mixed Tuesday with the S&P 500 hovering just above 2,000.

European stocks fell amid geopolitical jitters after EU governments abruptly halted new sanctions against Russia to assess the latest Ukraine cease-fire.

Asian shares ended the session mixed.

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2. -- The economic calendar in the U.S. on Tuesday includes the Job Openings and Labor Turnover Survey for July at 10 a.m. EDT.

3. -- U.S. stocks on Monday finished mixed. The Dow Jones Industrial Average  fell 0.15% to 17,111.42. The S&P 500 declined 0.31% to 2,001.54. The Nasdaq  rose 0.2% to 4,592.29, marked by gains in Yahoo! (YHOO) Microsoft (MSFT) and Google  (GOOG) .

4. -- The anticipated release of the newest iPhone Apple (AAPL)  is expected at 1 p.m. when the tech giant holds an event at the Flint Center for the Performing Arts, near its headquarters in Cupertino, Calif.

Along with a new, larger iPhone and possibly a computerized watch, Apple also could announce Tuesday a mobile payments strategy following several reports the company is working with payments companies Visa (V) , Mastercard (MA) and American Express (AXP) .

5. -- Home Depot (HD) confirmed on Monday that its payment systems were hacked in a data breach that could affect millions of shoppers who used credit and debit cards at its more than 2,000 stores in the U.S. and Canada..

The breach could turn out to be one of the biggest in history. The home-improvement retailer didn't say how many cards might be affected, but Home Depot did say its investigation into the breach goes as far back as April.

"We apologize for the frustration and anxiety this causes our customers, and I want to thank them for their patience and support as we work through this issue," Chairman and CEO Frank Blake said in a press release.

Home Depot has announced that it plans to have chip-enabled checkout terminals at all of its U.S. stores by the end of 2014.

6. -- General Mills (GIS) plans to buy Annie's (BNNY) , the organic food company known for its rabbit-shaped mac and cheese, for $820 million.

General Mills is paying $46 a share for Annie's. Annie's shares jumped 37% in aftermarket trading on Monday to $45.97.

General Mills, the Cheerios maker, has been trying to cut costs and has tweaked its recipes as sales have stagnated.

7. -- Bookseller Barnes & Noble (BKS) is expected by analysts on Tuesday to report a loss of 63 cents a share in its fiscal first quarter on revenue of $1.26 billion.

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