best performing mid cap stock between dec 2013 and june 2014

Plug Power (PLUG) had the highest return between December 1, 2013 and June 30, 2014 by a mid-cap US stock, returning 524%.

ASSETDATE% RETURN
Plug Power (PLUG)
12/1/2013 - 6/30/2014
524%
Green Brick Partners (GRBK)
12/1/2013 - 6/30/2014
255.97%
RadNet (RDNT)
12/1/2013 - 6/30/2014
228.22%
Applied Digital (APLD)
12/1/2013 - 6/30/2014
200%
Element Solutions (ESI)
12/1/2013 - 6/30/2014
133.58%
Sibanye Gold Ltd ADR (SBSW)
12/1/2013 - 6/30/2014
132.13%
Vipshop (VIPS)
12/1/2013 - 6/30/2014
126.08%
MakeMyTrip (MMYT)
12/1/2013 - 6/30/2014
119.56%
TG Therapeutics (TGTX)
12/1/2013 - 6/30/2014
113.41%
OceanaGold (OGC)
12/1/2013 - 6/30/2014
98.73%
BioCryst Pharmaceuticals (BCRX)
12/1/2013 - 6/30/2014
98.6%
Aya Gold & Silver Inc Common Shares (AYA)
12/1/2013 - 6/30/2014
95.45%
Centerra Gold (CGAU)
12/1/2013 - 6/30/2014
93.93%
Zillow (ZG)
12/1/2013 - 6/30/2014
85.33%
American Airlines (AAL)
12/1/2013 - 6/30/2014
82.42%
NovaGold Resources (NG)
12/1/2013 - 6/30/2014
82.25%
Synaptics (SYNA)
12/1/2013 - 6/30/2014
78.99%
Applied Opt (AAOI)
12/1/2013 - 6/30/2014
77.51%
Century Aluminum (CENX)
12/1/2013 - 6/30/2014
75%
Comstock Resources (CRK)
12/1/2013 - 6/30/2014
73.41%
Terawulf (WULF)
12/1/2013 - 6/30/2014
71.69%
Arrowhead Pharmaceuticals (ARWR)
12/1/2013 - 6/30/2014
71.58%
Golar LNG (GLNG)
12/1/2013 - 6/30/2014
70.83%
Travere Therapeutics (TVTX)
12/1/2013 - 6/30/2014
69.65%
Trinity Industries (TRN)
12/1/2013 - 6/30/2014
69.27%
Mid-cap stocks are treated as having a market cap between $2B and $10B.