Petróleo Brasileiro SA - Petrobras (PBR.A) had the best month in March 2016 by a large-cap US stock in March 2016, returning 75.6%.

ASSET	MONTH	% RETURN
Petróleo Brasileiro SA - Petrobras (PBR.A)	March 2016	75.57%
Petroleo Brasileiro Petrobras SA ADR (PBR)	March 2016	59.12%
Banco Bradesco S/A ADR (BBDO)	March 2016	46.51%
Block (SQ)	March 2016	44.15%
Marathon Oil (MRO)	March 2016	43.19%
Sarepta Therapeutics (SRPT)	March 2016	41.96%
Builders FirstSource (BLDR)	March 2016	41.41%
Natera (NTRA)	March 2016	40.41%
Ovintiv (OVV)	March 2016	39.75%
ArcelorMittal SA ADR (MT)	March 2016	39.58%
Devon Energy (DVN)	March 2016	38.75%
Banco Bradesco SA ADR (BBD)	March 2016	38.64%
Vale SA ADR (VALE)	March 2016	36.69%
Itau Unibanco Banco (ITUB)	March 2016	35.49%
Huazhu (HTHT)	March 2016	35.07%
Hewlett Packard Enterprise (HPE)	March 2016	32.73%
Advanced Micro Devices (AMD)	March 2016	31.94%
Freeport-McMoran Copper & Gold (FCX)	March 2016	31.89%
Ares Management (ARES)	March 2016	30.01%
Telefonica Brasil SA ADR (VIV)	March 2016	29.3%
Canadian Natural Resources (CNQ)	March 2016	28.85%
Teck Resources Ltd Class B (TECK)	March 2016	27.05%
Banco Santander Brasil SA ADR (BSBR)	March 2016	26.36%
Centrais Electricas Brasileiras (EBR)	March 2016	26.24%
Packaging Corp of America (PKG)	March 2016	24.47%

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