Aegon NV ADR (AEG) had the highest return between 1988 and 1990 by a US stock, returning 4,868.3%.

ASSET	YEARS	% RETURN
Aegon NV ADR (AEG)	1988-1990	4,868.25%
Powell Industries (POWL)	1988-1990	1,445.57%
Amtech Systems (ASYS)	1988-1990	1,311.29%
Argan (AGX)	1988-1990	1,005.27%
Utah Medical Products (UTMD)	1988-1990	717.28%
UnitedHealth (UNH)	1988-1990	564.43%
Nike (NKE)	1988-1990	515.34%
Telefonaktiebolaget LM Ericsson B ADR (ERIC)	1988-1990	491.81%
Nabors Industries (NBR)	1988-1990	400%
Devon Energy (DVN)	1988-1990	384.2%
AutoNation (AN)	1988-1990	379.76%
Cardinal Health (CAH)	1988-1990	339.84%
Home Depot (HD)	1988-1990	338.8%
US Bancorp (USB)	1988-1990	336.41%
Quantum (QMCO)	1988-1990	329.81%
Oceaneering International (OII)	1988-1990	327.3%
Glacier Bancorp (GBCI)	1988-1990	315.3%
Barnwell Industries (BRN)	1988-1990	311.66%
Johnson Controls International (JCI)	1988-1990	307.3%
Cracker Barrel Old Country Store (CBRL)	1988-1990	299.07%
Amgen (AMGN)	1988-1990	298.45%
Logility (LGTY)	1988-1990	292.13%
Cadence Design Systems (CDNS)	1988-1990	291.38%
Bridgford Foods (BRID)	1988-1990	273.77%
Leonardo DRS, Inc Common Stock (DRS)	1988-1990	273.33%