Aegon NV ADR (AEG) had the highest return between 1989 and 1990 by a US stock, returning 889.9%.

ASSET	YEARS	% RETURN
Aegon NV ADR (AEG)	1989-1990	889.87%
Weatherford International (WFRD)	1989-1990	735.82%
Powell Industries (POWL)	1989-1990	639.15%
Photronics (PLAB)	1989-1990	508.34%
AutoNation (AN)	1989-1990	499.93%
UnitedHealth (UNH)	1989-1990	447.89%
Oceaneering International (OII)	1989-1990	347.63%
Nike (NKE)	1989-1990	335.34%
Utah Medical Products (UTMD)	1989-1990	332.81%
Quantum (QMCO)	1989-1990	329.81%
Amgen (AMGN)	1989-1990	268.91%
Telefonaktiebolaget LM Ericsson B ADR (ERIC)	1989-1990	221.99%
Nabors Industries (NBR)	1989-1990	200%
Mesa Laboratories (MLAB)	1989-1990	199.95%
Microsoft (MSFT)	1989-1990	181.33%
Home Depot (HD)	1989-1990	180.63%
Altria (MO)	1989-1990	178.06%
Barrick Gold (GOLD)	1989-1990	164.66%
Encompass Health (EHC)	1989-1990	163.16%
Cognex (CGNX)	1989-1990	160.64%
CONMED (CNMD)	1989-1990	155.56%
Cardinal Health (CAH)	1989-1990	151.88%
Federal Signal (FSS)	1989-1990	151.18%
Devon Energy (DVN)	1989-1990	148.64%
Cracker Barrel Old Country Store (CBRL)	1989-1990	147.22%