Golden Matrix (GMGI) had the highest return in October 2015 by a US stock, returning 2,100%.

ASSET	MONTH	% RETURN
Golden Matrix (GMGI)	October 2015	2,100%
Castellum (CTM)	October 2015	1,254.55%
SRx Health Solutions (SRXH)	October 2015	614.29%
Dolphin Entertainment (DLPN)	October 2015	550.29%
Energy Recovery (ERII)	October 2015	231.94%
Netcapital (NCPL)	October 2015	200%
Ambow Education (AMBO)	October 2015	162%
LifeMD (LFMD)	October 2015	160%
OrganiGram (OGI)	October 2015	158.61%
Obsidian Energy (OBE)	October 2015	143.75%
Reliance Global (RELI)	October 2015	96.08%
Immunic (IMUX)	October 2015	90.44%
Anavex Life Sciences (AVXL)	October 2015	88.93%
Precision Optics Corporation, Inc Common stock (POCI)	October 2015	87.5%
GEE (JOB)	October 2015	85%
Baozun (BZUN)	October 2015	81.51%
Kandi Technologies (KNDI)	October 2015	79.24%
China Natural Resources (CHNR)	October 2015	71.21%
Sequans Communications (SQNS)	October 2015	69.09%
Educational Development (EDUC)	October 2015	65.75%
Canopy Growth (CGC)	October 2015	64.39%
Banco Macro SA B ADR (BMA)	October 2015	60.76%
Pampa Energia SA ADR (PAM)	October 2015	59.55%
Lincoln Educational Services (LINC)	October 2015	56.67%
FutureFuel (FF)	October 2015	55.5%