EnergyRex Energy to replace GT Advanced in S&P 600Oct. 06, 2014 6:23 PM ETRex Energy Corporation (REXX) StockBy: Eric Jhonsa, SA News Editor Following Wednesday's close, Rex Energy (NASDAQ:REXX) will take GT Advanced's spot in the S&P MidCap 600. GT filed for bankruptcy earlier today. Recommended For YouMore Trending NewsSee More »Related StocksSymbolLast Price% ChgREXX--Rex Energy CorporationTrending AnalysisTrending News