gen return february 1991 through december 1991
luv return february 1991 through december 1991
amat return february 1991 through december 1991
schw return february 1991 through december 1991
jkhy return february 1991 through december 1991
ptc return february 1991 through december 1991
amd return february 1991 through december 1991
nvr return february 1991 through december 1991
zbra return february 1992 through december 1992
jpm return february 1992 through december 1992
coo return february 1992 through december 1992
rost return february 1992 through december 1992
len return february 1992 through december 1992
mu return february 1992 through december 1992
tyl return february 1992 through december 1992
