Western Digital (WDC) had the highest return in August 1980 by a US stock, returning 58.3%.

ASSET	MONTH	% RETURN
Western Digital (WDC)	August 1980	58.33%
CACI International (CACI)	August 1980	47.06%
Range Resources (RRC)	August 1980	44.44%
Rand Capital (RAND)	August 1980	24.24%
Winnebago Industries (WGO)	August 1980	22.23%
Sony (SONY)	August 1980	21.74%
Spectrum Brands (SPB)	August 1980	19.55%
New York Times (NYT)	August 1980	16.35%
Service Corporation International (SCI)	August 1980	13.99%
Vishay Intertechnology (VSH)	August 1980	13.73%
Sysco (SYY)	August 1980	13.49%
APA (APA)	August 1980	13.02%
Texas Instruments (TXN)	August 1980	11.53%
Tutor Perini (TPC)	August 1980	10.6%
Walmart (WMT)	August 1980	10.46%
Molson Coors Brewing (TAP)	August 1980	10.24%
Berkshire Hathaway (BRK.A)	August 1980	10.14%
La-Z-Boy (LZB)	August 1980	9.8%
Worthington Industries (WOR)	August 1980	9.28%
First Horizon National (FHN)	August 1980	9.12%
Newmont Goldcorp (NEM)	August 1980	8.89%
BP PLC ADR (BP)	August 1980	8.89%
Lockheed Martin (LMT)	August 1980	8.74%
Siebert Financial (SIEB)	August 1980	8.56%
Automatic Data Processing (ADP)	August 1980	8.09%