Color Star Technology (ADD) had the highest return between 1999 and 2008 by a US stock, returning 120,004,700.2%.

ASSET	YEARS	% RETURN
Color Star Technology (ADD)	1999-2008	120,004,700.18%
InterContinental Hotels Group PLC ADR (IHG)	1999-2008	5,519,600%
India Globalization Capital (IGC)	1999-2008	1,616,566.67%
National Grid PLC ADR (NGG)	1999-2008	1,018,952.94%
Natwest (NWG)	1999-2008	953,400%
Hirequest (HQI)	1999-2008	935,500%
Taoping (TAOP)	1999-2008	863,957.6%
Houston American Energy (HUSA)	1999-2008	853,743.24%
Northern Oil & Gas (NOG)	1999-2008	838,607.69%
Know Labs (KNW)	1999-2008	534,224.43%
Cemtrex (CETX)	1999-2008	389,915.48%
NextTrip (NTRP)	1999-2008	159,900%
Ring Energy (REI)	1999-2008	146,566.67%
Inseego (INSG)	1999-2008	77,233.33%
Ocean Power Technologies (OPTT)	1999-2008	74,233.33%
Perspective Therapeutics (CATX)	1999-2008	66,566.67%
Lixte Biotechnology (LIXT)	1999-2008	55,965.57%
Flexible Solutions International (FSI)	1999-2008	37,464.71%
Alto Ingredients (ALTO)	1999-2008	31,587.24%
Gladstone Capital (GLAD)	1999-2008	21,454.25%
PharmaCyte Biotech (PMCB)	1999-2008	12,988.89%
NanoViricides (NNVC)	1999-2008	11,240%
Insmed (INSM)	1999-2008	11,037.44%
OPTIMIZERx (OPRX)	1999-2008	9,836%
First Majestic Silver (AG)	1999-2008	7,838.67%