Is the world's largest online retailer getting ready to challenge movie-subscription service Netflix? Amazon.com on Tuesday unveiled a videostreaming service -- available to its Prime members at no additional cost -- that could position it for battle.
The online retail giant functions like two stocks: One is speculative and volatile, with unusually high valuations -- and high demands for returns. The other is for long-term investors, who get rewarded for buying and holding with capital gains and consistent growth.









