Under Armour delivered autographed Curry 4 sneakers by drone to fans over the weekend. StockX CEO Josh Luber explains how this promotion is resonating with fans, and how the sneaker retailer is performing.

"The shoes are dropping from the sky, how cool is that," says Luber. "I love that Under Armour is being the innovator here and doing something different." Last week Stifel Nicolaus upgraded Under Armour, raising the price target from $11 to $17. Shares of the retailer have since been on the rise. Luber says if Under Armour can succeed in snagging a piece of the market in the basketball sector from Nike or Adidas it could really help the retailer.

Luber also shares his picks for the hottest sneakers on the resale market. This week those include Yeezy Boost 350 V2 Blue Tint, and Jordan 11 "Win Like 96."