Polaris Industries (PII) had the highest return between 1988 and 1989 by a US stock, returning 4,933.7%.

ASSET	YEARS	% RETURN
Polaris Industries (PII)	1988-1989	4,933.71%
Aegon NV ADR (AEG)	1988-1989	1,392.06%
Sono-Tek (SOTK)	1988-1989	1,112.9%
Perspective Therapeutics (CATX)	1988-1989	819.12%
Dmc Global (BOOM)	1988-1989	744.51%
Powell Industries (POWL)	1988-1989	681.78%
Telefonaktiebolaget LM Ericsson B ADR (ERIC)	1988-1989	597.01%
Utah Medical Products (UTMD)	1988-1989	584.12%
Birks (BGI)	1988-1989	555.44%
Weatherford International (WFRD)	1988-1989	488.43%
Devon Energy (DVN)	1988-1989	468.41%
Hurco Companies (HURC)	1988-1989	411.65%
Barnwell Industries (BRN)	1988-1989	374.26%
Badger Meter (BMI)	1988-1989	371.8%
Graham (GHM)	1988-1989	368.64%
HF Sinclair (DINO)	1988-1989	366.64%
Lumen Technologies (LUMN)	1988-1989	310.18%
Johnson Controls International (JCI)	1988-1989	300%
Nike (NKE)	1988-1989	296.88%
Oceaneering International (OII)	1988-1989	290.93%
Suncor Energy (SU)	1988-1989	289.29%
RCM Technologies (RCMT)	1988-1989	286.05%
Telephone and Data Systems (TDS)	1988-1989	279.03%
Nabors Industries (NBR)	1988-1989	273.33%
Valmont Industries (VMI)	1988-1989	269.28%