60 percent : Amazon's market share
25 percent: Barnes & Noble's Nook market share
10-15 percent: Apple's iBookstore share
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The U.S. stock market roared back on Friday, as technology stocks recovered much of their losses from earlier in the week and bitcoin halted its plunge, at least for now.
![Attendees of Frostbike made their way through the convention Saturday at the Quality Bike Products campus in Minneapolis. ] (AARON LAVINSKY/STAR TRIBUNE) aaron.lavinsky@startribune.com Frostbike 2016 was held at the Quality Bike Products Campus on Saturday, Feb. 27, 2016 in Bloomington, Minn.](https://arc.stimg.co/startribunemedia/NH2BSHB74ND2V6GF2G2HI5X4MM.jpg?&w=252&ar=3:2&fit=crop)
