Coeur Mining (CDE) had the lowest return between 2013 and 2014 by a large-cap US stock, returning -79.7%.

ASSET	YEARS	% RETURN
Coeur Mining (CDE)	2013-2014	-79.7%
Harmony Gold Mining (HMY)	2013-2014	-78.66%
Freedom (FRHC)	2013-2014	-76.19%
AngloGold Ashanti (AU)	2013-2014	-72.34%
Kinross Gold (KGC)	2013-2014	-71.4%
Exelixis (EXEL)	2013-2014	-69.36%
Ecopetrol SA ADR (EC)	2013-2014	-68.39%
Petroleo Brasileiro Petrobras SA ADR (PBR)	2013-2014	-61.36%
Teck Resources Ltd Class B (TECK)	2013-2014	-60.44%
Sociedad Quimica y Minera de Chile SA ADR B (SQM)	2013-2014	-59.25%
Alamos Gold (AGI)	2013-2014	-58.99%
Vale SA ADR (VALE)	2013-2014	-58.72%
Newmont Goldcorp (NEM)	2013-2014	-58.15%
Petróleo Brasileiro SA - Petrobras (PBR.A)	2013-2014	-57.41%
Gold Fields Ltd ADR (GFI)	2013-2014	-57.26%
Companhia de Saneamento Basico do Estado de Sao Paulo SABESP ADR (SBS)	2013-2014	-51.89%
Agnico Eagle Mines (AEM)	2013-2014	-51.79%
Pan American Silver (PAAS)	2013-2014	-48.54%
Wayfair (W)	2013-2014	-44.86%
Wheaton Precious Metals (WPM)	2013-2014	-43.88%
Viper Energy Ut (VNOM)	2013-2014	-41.68%
Coca-Cola Femsa SAB de CV ADR (KOF)	2013-2014	-40.29%
Sterling Construction (STRL)	2013-2014	-37.35%
ArcelorMittal SA ADR (MT)	2013-2014	-36.95%
BHP (BHP)	2013-2014	-36.83%

Large-cap stocks are treated as having a market cap of $10B+.