Caledonia Mining (CMCL) had the highest return between 1984 and 1985 by a US stock, returning 379,519.2%.

ASSET	YEARS	% RETURN
Caledonia Mining (CMCL)	1984-1985	379,519.23%
MDU Resources (MDU)	1984-1985	5,583.33%
Franklin Resources (BEN)	1984-1985	715.75%
CECO Environmental (CECO)	1984-1985	376.18%
Loews (L)	1984-1985	329.23%
Church & Dwight (CHD)	1984-1985	261.54%
Arthur J Gallagher (AJG)	1984-1985	245.81%
Tyson Foods (TSN)	1984-1985	241.99%
Badger Meter (BMI)	1984-1985	237.82%
Tootsie Roll Industries (TR)	1984-1985	234.83%
RLI (RLI)	1984-1985	227.23%
CNA Financial (CNA)	1984-1985	205.33%
Seneca Foods Corp B (SENEB)	1984-1985	200%
Oil-Dri Corporation Of America (ODC)	1984-1985	199.98%
Gap (GAP)	1984-1985	196.98%
Tejon Ranch (TRC)	1984-1985	186.73%
Escalade (ESCA)	1984-1985	176.99%
United Fire (UFCS)	1984-1985	176.52%
H2O America (HTO)	1984-1985	174.57%
Brown & Brown (BRO)	1984-1985	172.41%
Reading International (RDI)	1984-1985	166.35%
AutoNation (AN)	1984-1985	163.21%
Glacier Bancorp (GBCI)	1984-1985	156.52%
Kelly Services A (KELYA)	1984-1985	151.43%
American States Water (AWR)	1984-1985	148.23%