Frequency Electronics (FEIM) had the highest return between 1980 and 1981 by a US stock, returning 1,273%.

ASSET	YEARS	% RETURN
Frequency Electronics (FEIM)	1980-1981	1,273.02%
Espey Mfg & Electronics (ESP)	1980-1981	466.45%
McDonald’s (MCD)	1980-1981	449.12%
Kirby (KEX)	1980-1981	330.55%
Service Corporation International (SCI)	1980-1981	319.06%
Standard Motor Products (SMP)	1980-1981	262.14%
Essential Utilities (WTRG)	1980-1981	248.1%
Koss (KOSS)	1980-1981	212.44%
West Pharmaceutical Services (WST)	1980-1981	203.98%
Sysco (SYY)	1980-1981	170.24%
Sony (SONY)	1980-1981	164.14%
Jefferies Financial (JEF)	1980-1981	162.64%
Newtek Business Services (NEWT)	1980-1981	160%
Walmart (WMT)	1980-1981	159.11%
CACI International (CACI)	1980-1981	159.07%
PulteGroup (PHM)	1980-1981	156.91%
State Street (STT)	1980-1981	154.67%
Unifi (UFI)	1980-1981	149.5%
Southwest Airlines (LUV)	1980-1981	146.4%
Myers Industries (MYE)	1980-1981	146.14%
Tutor Perini (TPC)	1980-1981	137.26%
Carlisle Companies (CSL)	1980-1981	137.06%
Hasbro (HAS)	1980-1981	135.06%
Stryker (SYK)	1980-1981	132.45%
Superior Uniform (SGC)	1980-1981	128.24%