XLRE launched in October 2015, following a decision by S&P and MSCI to split the GICS financial sector into two new sectors: financials and real estate. Due to this update, sibling fund XLF spun-off its real estate exposure to this fund. XLRE represents the new real estate sector, although mortgage REITs remain in the financial sector. Like the rest of the sector SPDR suite, it holds a concentrated portfolio of mostly large-caps. The index is rebalanced quarterly.