United Community Banks (UCB) had the best month in March 2011 by a mid-cap US stock in March 2011, returning 70.1%.

ASSET	MONTH	% RETURN
United Community Banks (UCB)	March 2011	70.07%
Riot Blockchain (RIOT)	March 2011	45.3%
Golar LNG (GLNG)	March 2011	38.05%
Mesoblast (MESO)	March 2011	36.05%
First Majestic Silver (AG)	March 2011	34.43%
Patrick Industries (PATK)	March 2011	33.07%
Universal Display (OLED)	March 2011	29.57%
Endeavour Silver (EXK)	March 2011	29.21%
Jazz Pharmaceuticals (JAZZ)	March 2011	27.81%
Bausch Health Companies (BHC)	March 2011	24.53%
Nexstar Broadcasting (NXST)	March 2011	24.39%
Amneal Pharmaceuticals, Inc Class A Common Stock (AMRX)	March 2011	23.42%
NewMarket (NEU)	March 2011	23%
CVR Energy (CVI)	March 2011	22.87%
Chart Industries (GTLS)	March 2011	22.8%
Dorman Products (DORM)	March 2011	21.23%
Colliers International Group Inc Bats (CIGI)	March 2011	21.12%
Olin (OLN)	March 2011	20.57%
New Gold (NGD)	March 2011	20.23%
Delek US Energy (DK)	March 2011	19.89%
Primoris Services (PRIM)	March 2011	18.77%
B2Gold (BTG)	March 2011	17.87%
FirstCash (FCFS)	March 2011	17.4%
PLDT Inc ADR (PHI)	March 2011	17.33%
Avis Budget (CAR)	March 2011	16.91%

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