Micron Technology (MU) had the highest return in August 2016 by a US stock with a market cap of $100B+, returning 19.4%.

ASSET	MONTH	% RETURN
Micron Technology (MU)	August 2016	19.41%
Alibaba (BABA)	August 2016	17.39%
HSBC Holdings PLC ADR (HSBC)	August 2016	16.97%
Applied Materials (AMAT)	August 2016	13.38%
MercadoLibre (MELI)	August 2016	12.33%
Arista Networks (ANET)	August 2016	12.01%
Bank of America (BAC)	August 2016	11.67%
Morgan Stanley (MS)	August 2016	11.17%
Charles Schwab (SCHW)	August 2016	10.45%
Banco Bilbao Viscaya Argentaria SA ADR (BBVA)	August 2016	10.09%
Deere (DE)	August 2016	8.75%
Citigroup (C)	August 2016	8.7%
Broadcom (AVGO)	August 2016	8.38%
Sumitomo Mitsui Financial (SMFG)	August 2016	7.75%
Toyota Motor Corporation ADR (TM)	August 2016	7.59%
Advanced Micro Devices (AMD)	August 2016	7.4%
Banco Santander SA ADR (SAN)	August 2016	7.18%
NVIDIA (NVDA)	August 2016	7.18%
Goldman Sachs (GS)	August 2016	7.12%
Capital One Financial (COF)	August 2016	7.06%
Netflix (NFLX)	August 2016	6.82%
Merck (MRK)	August 2016	6.73%
Wells Fargo (WFC)	August 2016	6.73%
Mitsubishi UFJ Financial Group Inc ADR (MUFG)	August 2016	5.96%
Eaton (ETN)	August 2016	5.85%