Campbell Soup Company Common Stock (CPB) had the highest return in April 1989 by a US stock in the S&P 500 (GSPC), returning 23.5%.

ASSET	MONTH	% RETURN
Campbell Soup Company Common Stock (CPB)	April 1989	23.49%
Valero Energy (VLO)	April 1989	22.61%
Adobe Systems (ADBE)	April 1989	20.22%
Oracle (ORCL)	April 1989	20.19%
Tyler Technologies (TYL)	April 1989	19.55%
Applied Materials (AMAT)	April 1989	19.38%
Lam Research (LRCX)	April 1989	19.31%
Expeditors International of Washington (EXPD)	April 1989	19.11%
Devon Energy (DVN)	April 1989	16.67%
APA (APA)	April 1989	15.28%
West Pharmaceutical Services (WST)	April 1989	14.69%
NiSource (NI)	April 1989	14.5%
Cardinal Health (CAH)	April 1989	14.48%
Tyson Foods (TSN)	April 1989	14.29%
Charles Schwab (SCHW)	April 1989	14.1%
Thermo Fisher Scientific (TMO)	April 1989	13.97%
Raytheon Technologies (RTX)	April 1989	13.66%
Analog Devices (ADI)	April 1989	13.25%
Costco Wholesale (COST)	April 1989	13.2%
Stryker (SYK)	April 1989	13%
CMS Energy (CMS)	April 1989	13%
ONEOK (OKE)	April 1989	12.64%
W R Berkley (WRB)	April 1989	12.61%
UnitedHealth (UNH)	April 1989	12.55%
Intel (INTC)	April 1989	12.1%