owners include many of the largest green portfolios, measured as the estimated share of total portfolio value that has either LEED or EnergyStar certification. Just a few of the representative green indexed REITs include Douglas Emmett (DEI), Government Properties Income Trust (GOV), Piedmont Office Realty Trust (PDM), Boston Properties (BXP), Franklin Street Properties (FSP), Brandywine Realty Trust (BDN), Vornado Realty Trust (VNO), SL Green Realty (SLG), Ashford Hospitality Trust (AHT), Kilroy Realty (KRC), Washington REIT (WRE), and Cousins Properties (CUZ).