may 15 2011 to may 31 2011 best small cap

Ring Energy (REI) had the highest return between May 15, 2011 and May 31, 2011 by a small-cap US stock, returning 170.5%.

ASSETDATE% RETURN
Ring Energy (REI)
5/15/2011 - 5/31/2011
170.51%
American Coastal Insurance (ACIC)
5/15/2011 - 5/31/2011
73.49%
United States Antimony (UAMY)
5/15/2011 - 5/31/2011
54.34%
Sellas Life Sciences (SLS)
5/15/2011 - 5/31/2011
50%
Caledonia Mining (CMCL)
5/15/2011 - 5/31/2011
41.67%
Agilysys (AGYS)
5/15/2011 - 5/31/2011
38.98%
Pacira BioSciences (PCRX)
5/15/2011 - 5/31/2011
37.63%
Paysign (PAYS)
5/15/2011 - 5/31/2011
25%
Natures Sunshine Products (NATR)
5/15/2011 - 5/31/2011
22.83%
Donegal Group B (DGICB)
5/15/2011 - 5/31/2011
21.86%
ChipMOS Technologies (IMOS)
5/15/2011 - 5/31/2011
21.12%
ANI Pharmaceuticals (ANIP)
5/15/2011 - 5/31/2011
19.92%
FuelCell Energy (FCEL)
5/15/2011 - 5/31/2011
18.75%
Vericel Corp Ord (VCEL)
5/15/2011 - 5/31/2011
18.05%
Arbutus Biopharma (ABUS)
5/15/2011 - 5/31/2011
17.96%
Osisko Development (ODV)
5/15/2011 - 5/31/2011
17.41%
Xpel (XPEL)
5/15/2011 - 5/31/2011
16.67%
HealthStream (HSTM)
5/15/2011 - 5/31/2011
15.8%
Eyepoint Pharmaceuticals (EYPT)
5/15/2011 - 5/31/2011
15.5%
Mitek Systems (MITK)
5/15/2011 - 5/31/2011
15.07%
Contango ORE (CTGO)
5/15/2011 - 5/31/2011
14.86%
Galiano Gold (GAU)
5/15/2011 - 5/31/2011
14.74%
Braskem SA Class A (BAK)
5/15/2011 - 5/31/2011
14.37%
W&T Offshore (WTI)
5/15/2011 - 5/31/2011
14.05%
Emergent Biosolutions (EBS)
5/15/2011 - 5/31/2011
13.91%
Small-cap stocks are treated as having a market cap between $300M and $2B.