In November 2017, S&P Dow Jones Indices and MSCI Inc. announced revisions to the Global Industry Classification System (GICS) to be effective after the close of business on September 28, 2018. The most significant of the changes to GICS was to the Telecommunication Services sector, which has been renamed and broadened in its scope.
We updated the summary statistics of the 2018 Relative TSR Client Briefing reflect the updated GICS classification. Communication Services companies show overall RTSR prevalence of 41%. See the link below for the updated statistics.
2018 Relative TSR Statistics—GICS Structure Updates