Green Brick Partners (GRBK) had the highest return in March 2014 by a mid-cap US stock, returning 151.7%.

ASSET	MONTH	% RETURN
Green Brick Partners (GRBK)	March 2014	151.73%
Plug Power (PLUG)	March 2014	54.35%
RadNet (RDNT)	March 2014	43.43%
Corcept Therapeutics (CORT)	March 2014	33.74%
Agios Pharm (AGIO)	March 2014	30.41%
Energy of Minas Gerais Co DRC (CIG.C)	March 2014	23.93%
Companhia Paranaense de Energia Pref ADR (ELP)	March 2014	23.79%
Travere Therapeutics (TVTX)	March 2014	23.4%
BBVA Banco Frances SA ADR (BBAR)	March 2014	22.55%
Tower Semiconductor (TSEM)	March 2014	22.03%
Pampa Energia SA ADR (PAM)	March 2014	21.97%
MACOM Technology Solutions (MTSI)	March 2014	21.17%
Pilgrims Pride (PPC)	March 2014	20.72%
Grupo Financiero Galicia SA ADR (GGAL)	March 2014	20.33%
Mercury Systems (MRCY)	March 2014	19.76%
Banco Macro SA B ADR (BMA)	March 2014	19.74%
Companhia Energetica de Minas Gerais CEMIG Pref ADR (CIG)	March 2014	18.47%
Cal-Maine Foods (CALM)	March 2014	18.25%
Korn Ferry (KFY)	March 2014	18.18%
Rambus (RMBS)	March 2014	17.87%
Grupo Aeroportuario del Centro Norte SAB de CV (OMAB)	March 2014	17.73%
Sharplink Gaming (SBET)	March 2014	17.71%
Transportadora de Gas del Sur SA ADR (TGS)	March 2014	17.64%
United Community Banks (UCB)	March 2014	17.35%
Globalstar, Inc Common Stock (GSAT)	March 2014	17.26%

Mid-cap stocks are treated as having a market cap between $2B and $10B.