Nomura Holdings Inc ADR (NMR) had the highest return in December 2012 by a large-cap US stock, returning 43.4%.

ASSET	MONTH	% RETURN
Nomura Holdings Inc ADR (NMR)	December 2012	43.44%
Genmab A-S (GMAB)	December 2012	32.58%
Western Digital (WDC)	December 2012	27.33%
YPF Sociedad Anonima (YPF)	December 2012	26.41%
Grupo Financiero Galicia SA ADR (GGAL)	December 2012	24.67%
Seagate Technology (STX)	December 2012	21.59%
Nokia (NOK)	December 2012	20.06%
Delta Air Lines (DAL)	December 2012	18.82%
Shinhan Financial (SHG)	December 2012	18.61%
Tempur Sealy International (TPX)	December 2012	18.29%
Vale SA ADR (VALE)	December 2012	18.28%
Mitsubishi UFJ Financial Group Inc ADR (MUFG)	December 2012	18.08%
Trip Group Ltd ADR (TCOM)	December 2012	17.84%
Bank of America (BAC)	December 2012	17.04%
United Airlines (UAL)	December 2012	16.15%
Rio Tinto ADR (RIO)	December 2012	15.37%
Sony (SONY)	December 2012	15.23%
Stellantis (STLA)	December 2012	14.51%
LyondellBasell Industries (LYB)	December 2012	14.43%
MGM Resorts International (MGM)	December 2012	14.34%
Mizuho Financial (MFG)	December 2012	14.02%
STMicroelectronics NV ADR (STM)	December 2012	14.01%
Natwest (NWG)	December 2012	13.94%
Honda Motor Co Ltd ADR (HMC)	December 2012	13.76%
Sumitomo Mitsui Financial (SMFG)	December 2012	13.62%

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