Here's everything you need to know before Monday's opening bell: 

  1. Celgene (CELG) agreed to buy Impact Biomedicines for as much as $7 billion. 
  2. Apple (AAPL) has been urged to take action to curb growing smartphone addiction among children. 
  3. Driverless cars steal the show at the first day of CES in Las Vegas.
  4. Dunkin' (DNKN) will roll out its streamlined menu at all U.S. locations by mid-March.
  5. U.S. stock futures suggest Wall Street's strong start to the new year will continue.

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