NXP Semiconductors (NXPI) had the highest return in December 2010 by a US stock with a market cap of $50B+, returning 64.3%.

ASSET	MONTH	% RETURN
NXP Semiconductors (NXPI)	December 2010	64.29%
Manulife Financial (MFC)	December 2010	20.99%
Bank of America (BAC)	December 2010	19.43%
Mizuho Financial (MFG)	December 2010	17.18%
Sumitomo Mitsui Financial (SMFG)	December 2010	16.94%
Boston Scientific (BSX)	December 2010	16.64%
Freeport-McMoran Copper & Gold (FCX)	December 2010	16.37%
Equinor ASA ADR (EQNR)	December 2010	16.23%
BlackRock (BLK)	December 2010	15.85%
Motorola Solutions (MSI)	December 2010	15.25%
Petróleo Brasileiro SA - Petrobras (PBR.A)	December 2010	15.18%
CRH PLC ADR (CRH)	December 2010	15.11%
Petroleo Brasileiro Petrobras SA ADR (PBR)	December 2010	15.1%
GE Aerospace (GE)	December 2010	15%
Axon Enterprise (AXON)	December 2010	14.63%
Home Depot (HD)	December 2010	14.57%
Taiwan Semiconductor Manufacturing (TSM)	December 2010	14.42%
TE Connectivity (TEL)	December 2010	14.34%
MetLife (MET)	December 2010	14.21%
Mitsubishi UFJ Financial Group Inc ADR (MUFG)	December 2010	13.89%
ASML Holding NV ADR (ASML)	December 2010	13.8%
Royal Caribbean Cruises (RCL)	December 2010	13.69%
Oracle (ORCL)	December 2010	13.65%
Aon (AON)	December 2010	13.63%
Canadian Natural Resources (CNQ)	December 2010	13.31%