Riley Exploration Permian (REPX) had the highest return in June 2008 by a small-cap US stock, returning 138.4%.

ASSET	MONTH	% RETURN
Riley Exploration Permian (REPX)	June 2008	138.39%
Sapiens International (SPNS)	June 2008	67.57%
Intrepid Potash (IPI)	June 2008	37.27%
Crawford (CRD.B)	June 2008	34.06%
Metalla Royalty & Streaming (MTA)	June 2008	28.27%
Titan Machinery (TITN)	June 2008	28.1%
First Bank (FRBA)	June 2008	27.27%
Crawford (CRD.A)	June 2008	25%
North American Construction (NOA)	June 2008	21.46%
Nabors Industries (NBR)	June 2008	20.69%
Baytex Energy (BTE)	June 2008	19.48%
Flotek Industries (FTK)	June 2008	19.4%
Mesa Laboratories (MLAB)	June 2008	19.11%
Golden Entertainment (GDEN)	June 2008	18.77%
Northwest Pipe (NWPX)	June 2008	18.67%
ANI Pharmaceuticals (ANIP)	June 2008	18.5%
Olympic Steel (ZEUS)	June 2008	17.92%
La-Z-Boy (LZB)	June 2008	17.69%
Mesabi Trust (MSB)	June 2008	16.14%
Permian Basin Royalty Trust (PBT)	June 2008	16.1%
ePlus (PLUS)	June 2008	16.04%
Vaalco Energy (EGY)	June 2008	15.87%
Dorchester Minerals (DMLP)	June 2008	15.47%
Helmerich and Payne (HP)	June 2008	14.83%
Greenlight Capital Re (GLRE)	June 2008	14.59%

Small-cap stocks are treated as having a market cap between $300M and $2B.