Centrais Electricas Brasileiras (EBR) had the highest return in Q4 2018 by a large-cap US stock, returning 61.6%.

ASSET	QUARTER	% RETURN
Centrais Electricas Brasileiras (EBR)	Q4 2018	61.58%
Centrais Elétricas Brasileiras SA - Eletrobrás (EBR.B)	Q4 2018	59.56%
AngloGold Ashanti (AU)	Q4 2018	45.09%
Gold Fields Ltd ADR (GFI)	Q4 2018	44.86%
Banco Bradesco SA ADR (BBD)	Q4 2018	43.89%
Banco Bradesco S/A ADR (BBDO)	Q4 2018	39.67%
Companhia de Saneamento Basico do Estado de Sao Paulo SABESP ADR (SBS)	Q4 2018	36.32%
Banco Santander Brasil SA ADR (BSBR)	Q4 2018	27.35%
Itau Unibanco Banco (ITUB)	Q4 2018	25.23%
Telefonica Brasil SA ADR (VIV)	Q4 2018	24.26%
argenx NV ADR (ARGX)	Q4 2018	23.48%
Barrick Gold (GOLD)	Q4 2018	23.11%
Kinross Gold (KGC)	Q4 2018	20%
Agnico Eagle Mines (AEM)	Q4 2018	18.77%
ICICI Bank (IBN)	Q4 2018	18.68%
Newmont Goldcorp (NEM)	Q4 2018	15.23%
Petróleo Brasileiro SA - Petrobras (PBR.A)	Q4 2018	13.94%
Starbucks (SBUX)	Q4 2018	13.77%
Franco-Nevada (FNV)	Q4 2018	12.78%
Wheaton Precious Metals (WPM)	Q4 2018	12.5%
Procter & Gamble (PG)	Q4 2018	11.31%
Royal Gold (RGLD)	Q4 2018	11.27%
CME (CME)	Q4 2018	11.26%
Church & Dwight (CHD)	Q4 2018	11.04%
Exelixis (EXEL)	Q4 2018	11%

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