best performing large cap stocks in a month 1999

F5 Networks (FFIV) had the best month in 1999 by a large-cap US stock in June 1999, returning 300%.

ASSET MONTH % RETURN
F5 Networks (FFIV)
June 1999
300%
Suzano Papel e Celulose SA ADR (SUZ)
September 1999
287.43%
Lam Research (LRCX)
January 1999
111.73%
F5 Networks (FFIV)
October 1999
107.09%
Incyte (INCY)
December 1999
106.9%
VeriSign (VRSN)
December 1999
104.21%
Neurocrine Biosciences (NBIX)
December 1999
102.04%
Qualcomm (QCOM)
December 1999
93.81%
Cheniere Energy (LNG)
January 1999
92.04%
Cognizant Technology Solutions Corp Class A (CTSH)
December 1999
91.16%
Neurocrine Biosciences (NBIX)
November 1999
89.29%
Agilent Technologies (A)
December 1999
83.26%
Booking (BKNG)
April 1999
76.98%
CoStar (CSGP)
January 1999
75.7%
ArcelorMittal SA ADR (MT)
April 1999
75.63%
Copart (CPRT)
December 1999
71.7%
Qualcomm (QCOM)
March 1999
70.96%
MicroStrategy (MSTR)
October 1999
70.08%
Lam Research (LRCX)
June 1999
69.76%
MicroStrategy (MSTR)
December 1999
69.18%
Intuit (INTU)
November 1999
69.13%
CGI (GIB)
December 1999
64.66%
Akamai Technologies (AKAM)
November 1999
64.58%
Oracle (ORCL)
December 1999
63.74%
Qualcomm (QCOM)
November 1999
63.53%
Large-cap stocks are treated as having a market cap of $10B+.