An overhaul of Wall Street’s technology and media sectors coincided with the quarterly expiration of futures and options, bringing a burst of volume to trading late on Friday that could continue in the days that follow. Traders work on the floor of the New York Stock Exchange (NYSE) in New York, U.S., September 20, 2018. REUTERS/Brendan McDermidAfter the close on Friday, S&P Dow Jones Indices was poised to reorganize several of its sectors and relaunch its telecommunications index as a new communication services sector. About 10.87 billion shares changed hands on U.S. exchanges on Friday, the highest volume since Feb. 9 and one of the highest-volume sessions of the year, according to Thomson Reuters. A big chunk of the volume came in the last 15 minutes of the session.