HF Sinclair (DINO) had the highest return on February 21, 1989 by a US stock, returning 17.5%.

ASSET	DATE	% RETURN
HF Sinclair (DINO)	2/21/1989	17.49%
National Presto Industries (NPK)	2/21/1989	4.73%
San Juan Basin Royalty Trust (SJT)	2/21/1989	4.61%
PAR Technology (PAR)	2/21/1989	3.71%
Sturm Ruger (RGR)	2/21/1989	3.7%
Nordson (NDSN)	2/21/1989	3.63%
Allient (ALNT)	2/21/1989	3.58%
Dominari (DOMH)	2/21/1989	3.57%
KB Home (KBH)	2/21/1989	3.3%
Universal Health Services (UHS)	2/21/1989	2.91%
Cabot (CBT)	2/21/1989	2.67%
Pinnacle West Capital (PNW)	2/21/1989	2.44%
Agnico Eagle Mines (AEM)	2/21/1989	2.44%
Applied Industrial Technologies (AIT)	2/21/1989	2.43%
Newmont Goldcorp (NEM)	2/21/1989	2.26%
Chicago Rivet & Machine (CVR)	2/21/1989	2.21%
BHP (BHP)	2/21/1989	2.18%
Meritage (MTH)	2/21/1989	2.17%
Becton Dickinson and (BDX)	2/21/1989	2.07%
Haverty Furniture Companies (HVT)	2/21/1989	2%
Abbott Laboratories (ABT)	2/21/1989	1.93%
KLA-Tencor (KLAC)	2/21/1989	1.92%
Essential Utilities (WTRG)	2/21/1989	1.89%
Array Digital Infrastructure (AD)	2/21/1989	1.85%
Sensient Technologies (SXT)	2/21/1989	1.85%