A weak manufacturing survey reading put semiconductor sector investors in a profit-taking mood, but the sell-off may be an opportunity.Shares of semiconductor sector favorites Micron Technology (MU -7.96%), Arm Holdings (ARM -6.88%), and ASML Holdings (ASML -6.47%) fell hard to start off September, down 8%, 6.9%, and 6.5%, respectively, as of the close of trading Tuesday.Weaker-than-expected macroeconomic data sent the entire chip sector down hard, and ASML drew attention in a trade war spat regarding China ...