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Amazon.com (NASDAQ:AMZN) stock has delivered explosive gains lately, rising by almost 70% year to date. Is this based on solid fundamental drivers, or pure market speculation?

The following slideshow takes a look at the key reasons behind Amazon's big gains in 2015.

 

Andrés Cardenal owns shares of Amazon.com. The Motley Fool owns and recommends Amazon.com. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.