Reddit Set to Join S&P 500 and Sun Communities to Join S&P MidCap 400 | AVB Stock News
StockTitan·- S&P Dow Jones Indices announced index adjustments for the S&P 500 and S&P MidCap 400. - Reddit will join the S&P 500 on August 18, 2026, replacing AvalonBay Communities due to its upcoming acquisition by Equity Residential. - Sun Communities will enter the S&P MidCap 400 on August 20, 2026, replacing Webster Financial following its acquisition by Banco Santander S.A.