BHP (BHP) had the highest return in March 1984 by a US stock, returning 200.3%.

ASSET	MONTH	% RETURN
BHP (BHP)	March 1984	200.28%
Walt Disney (DIS)	March 1984	34.57%
Tootsie Roll Industries (TR)	March 1984	25.34%
Jacobs Solutions (J)	March 1984	21.83%
Teva Pharma Industries Ltd ADR (TEVA)	March 1984	21.04%
Seneca Foods Corp B (SENEB)	March 1984	20%
Bel Fuse A (BELFA)	March 1984	17.65%
Air Products and Chemicals (APD)	March 1984	17.27%
Weatherford International (WFRD)	March 1984	16.69%
Smith AO (AOS)	March 1984	16.51%
Suncor Energy (SU)	March 1984	15.22%
Dupont De Nemours (DD)	March 1984	15.07%
Graham (GHC)	March 1984	15.02%
Caterpillar (CAT)	March 1984	14.85%
Universal Health Services (UHS)	March 1984	14.29%
Honda Motor Co Ltd ADR (HMC)	March 1984	13.91%
Southwest Airlines (LUV)	March 1984	13.69%
Valhi (VHI)	March 1984	13.33%
Tegna (TGNA)	March 1984	13.24%
British American Tobacco (BTI)	March 1984	13.04%
Spectrum Brands (SPB)	March 1984	13.04%
Sony (SONY)	March 1984	12.71%
Olin (OLN)	March 1984	12.55%
Gap (GAP)	March 1984	12.27%
Service Corporation International (SCI)	March 1984	11.6%