Dec. 3 Premarket Briefing: 10 Things You Should Know

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Here are 10 things you should know for Tuesday, Dec. 3: 

1.-- U.S. stock futures were pointing slightly lower on Tuesday ahead of economic data later this week that investors will use to gauge the Federal Reserve's next move on economic stimulus.

European stocks were lower. Asian shares ended mostly to the downside but Japan's Nikkei 225 index added 0.6% on weakness in the yen. 

2.-- The  economic calendar  in the U.S. Tuesday includes auto and truck sales for November from manufacturers such as Ford  and General Motors

3.-- U.S. stocks  on Monday declined as a slow kickoff to the holiday shopping season offset a strong uptick in manufacturing activity.

The S&P 500 fell 0.27% to 1,800.88 while the  Dow Jones Industrial Average declined 0.48% to 16,008.64. The  Nasdaq dipped 0.36% to 4,045.26.

4.-- Online shopping on Cyber Monday rose 17.5% from the same time last year, according to figures by IBM Benchmark. Mobile devices accounted for more than 29% of all online traffic.

Research firm comScore forecast Cyber Monday sales of $2 billion, up from about $1.47 billion last year. Online sales account for about 10% of total holiday spending, which was projected to increase about 3.9% to $602.1 billion for November and December.

5.-- Apple  is buying  Topsy, a social-media analytics firm, for $200 million.

Topsy allows companies to gather information from  Twitter  and track consumer sentiment. 

An Apple spokeswoman confirmed the deal in an email to  TheStreet. The news was first reported by The Wall Street Journal .

6.-- A high-tech barge that Google is building at Treasure Island off San Francisco is the first of three " floating retail stores " the Internet giant plans to launch, The San Francisco Chronicle reported. The total cost of the project is $35 million.

In a confidential budget report obtained by the newspaper, builder Turner Construction said the idea is to construct the vessels at Treasure Island, then dock them in San Francisco, Los Angeles and New York.

Miriam Saez, director of operations for the Treasure Island Development Authority, told the Chronicle that Google reps told her "this would be an important opportunity for the launching" of their Google Glass computer eyewear next year.

7.-- President Obama plans to speak about his signature health care program -- the Affordable Care Act -- at 2:30 p.m. EST on Tuesday.

Obama's speech follows the relaunch of government Web site HealthCare.gov, which was plagued by problems since it opened in October but is now working at an acceptable level, the White House said.

8.-- Krispy Kreme's third-quarter profit rose 34% from a year earlier but the doughnut chain predicted disappointing earnings for the coming year.

The company said earnings excluding special items will range between 71 cents and 76 cents a share for the year ending in February 2015, below analysts' forecasts of 77 cents.