Occidental Petroleum (OXY) had the lowest return in August 2020 by a US stock in the S&P 500 (GSPC), returning -19.1%.

ASSET	MONTH	% RETURN
Occidental Petroleum (OXY)	August 2020	-19.11%
Evergy (EVRG)	August 2020	-16.84%
Hologic (HOLX)	August 2020	-15.41%
Becton Dickinson and (BDX)	August 2020	-14.21%
Arista Networks (ANET)	August 2020	-14.06%
Moderna (MRNA)	August 2020	-13.4%
Quest Diagnostics (DGX)	August 2020	-12.91%
Datadog (DDOG)	August 2020	-12.81%
Huntington Ingalls Industries (HII)	August 2020	-12.35%
Lam Research (LRCX)	August 2020	-11.68%
Super Micro Computer (SMCI)	August 2020	-11.65%
Pinnacle West Capital (PNW)	August 2020	-11.62%
Western Digital (WDC)	August 2020	-10.96%
Cisco Systems (CSCO)	August 2020	-10.44%
Micron Technology (MU)	August 2020	-9.68%
American International (AIG)	August 2020	-9.53%
ResMed (RMD)	August 2020	-9.42%
NiSource (NI)	August 2020	-9.03%
Laboratory Corporation of America (LH)	August 2020	-8.67%
Cardinal Health (CAH)	August 2020	-8.62%
American Electric Power (AEP)	August 2020	-8.24%
Bio-Techne (TECH)	August 2020	-8.14%
Jack Henry & Associates (JKHY)	August 2020	-7.95%
Targa Resources (TRGP)	August 2020	-6.69%
Centene (CNC)	August 2020	-6.6%