KLA-Tencor (KLAC) had the lowest return on November 1, 2017 by a US stock with a market cap of $50B+, returning -4.4%.

ASSET	DATE	% RETURN
KLA-Tencor (KLAC)	11/1/2017	-4.41%
Apollo Global Management LLC Class A (APO)	11/1/2017	-4.38%
Advanced Micro Devices (AMD)	11/1/2017	-4%
Cummins (CMI)	11/1/2017	-3.59%
Lam Research (LRCX)	11/1/2017	-3.58%
Tesla (TSLA)	11/1/2017	-3.36%
Vertex Pharmaceuticals (VRTX)	11/1/2017	-3.2%
NetEase (NTES)	11/1/2017	-2.85%
Thomson Reuters Corporation Common Shares (TRI)	11/1/2017	-2.79%
Royal Caribbean Cruises (RCL)	11/1/2017	-2.73%
L3Harris Technologies (LHX)	11/1/2017	-2.63%
Palo Alto Networks (PANW)	11/1/2017	-2.43%
Applied Materials (AMAT)	11/1/2017	-2.26%
ServiceNow (NOW)	11/1/2017	-2.11%
Arista Networks (ANET)	11/1/2017	-2.06%
Trane Technologies (TT)	11/1/2017	-1.93%
Alnylam Pharmaceuticals (ALNY)	11/1/2017	-1.9%
Charles Schwab (SCHW)	11/1/2017	-1.89%
Broadcom (AVGO)	11/1/2017	-1.87%
Southern Copper (SCCO)	11/1/2017	-1.85%
Newmont Goldcorp (NEM)	11/1/2017	-1.84%
Vistra Energy (VST)	11/1/2017	-1.84%
Apple (AAPL)	11/1/2017	-1.75%
O’Reilly Automotive (ORLY)	11/1/2017	-1.74%
Regeneron Pharmaceuticals (REGN)	11/1/2017	-1.69%