HCA (HCA) had the highest return in July 2014 by a US stock with a market cap of $40B+, returning 15.1%.

ASSET	MONTH	% RETURN
HCA (HCA)	July 2014	15.12%
Baidu (BIDU)	July 2014	14.89%
America Movil SAB de CV ADR (AMX)	July 2014	14.78%
Warner Bros Discovery (WBD)	July 2014	14.61%
Chipotle Mexican Grill (CMG)	July 2014	12.77%
Intuitive Surgical (ISRG)	July 2014	11.1%
Regeneron Pharmaceuticals (REGN)	July 2014	10.76%
Gilead Sciences (GILD)	July 2014	9.81%
Flutter Entertainment (FLUT)	July 2014	9.64%
Intel (INTC)	July 2014	9.36%
Sony (SONY)	July 2014	9.31%
Nasdaq (NDAQ)	July 2014	8.74%
Petroleo Brasileiro Petrobras SA ADR (PBR)	July 2014	8.43%
Facebook (META)	July 2014	7.5%
Southern Copper (SCCO)	July 2014	7.49%
Royal Caribbean Cruises (RCL)	July 2014	7.3%
Petróleo Brasileiro SA - Petrobras (PBR.A)	July 2014	7.13%
NetEase (NTES)	July 2014	7.06%
Itau Unibanco Banco (ITUB)	July 2014	6.72%
Amgen (AMGN)	July 2014	6.7%
Marathon Petroleum (MPC)	July 2014	6.66%
Vale SA ADR (VALE)	July 2014	6.46%
Natwest (NWG)	July 2014	5.88%
CoreSite Realty (COR)	July 2014	5.83%
International Business Machines (IBM)	July 2014	5.49%