Philip van Doorn. To follow the writer on Twitter, go to http://twitter.com/PhilipvanDoorn.
The heart-implant manufacturer is down some 3% over two days, but is up about 15% so far this month.
The high court's decision that Web retailers must collect state sales tax doesn't change AMZN's great-looking chart.
Oil prices are currently in a "sweet spot" according to John Eade, CEO of Argus Research.