Here's everything you need to know before Wednesday's opening bell:
- Amazon (AMZN) bought smart doorbell maker and former Shark Tank contestant Ring.
- Weight Watchers (WTW) shares rallied after-hours after beating Wall Street's earnings estimates.
- Same-store sales at Papa John's (PZZA) dived 3.9% in the fourth quarter.
- Square (SQ) beat estimates but its stock still fell after yesterday's close.
- U.S. stock futures pointed higher.
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