Has Allegro Microsystems (ALGM) Stock Risen Extended Session For A Reason?

Due to the upcoming upgrading to a major index listing, Allegro MicroSystems Inc. (NASD: ALGM) was gaining on the charts Friday, up 5.40% to trade at $33.20 at the last check. Where will ALGM assume the more senior position? Semtech Corp. (SMTC) will be replaced by Allegro Microsystems (ALGM) in the S&P MidCap 400, while […]