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).

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At the office of Realty ONE Group, salesman Kurt Lehman mulls over another set of charts and graphs, ones that show Las Vegas home sales down nearly 40 percent compared to a year ago.

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ProLogis also has blazed past two other REITs that mix warehouses with office holdings, Duke Realty and Liberty Property.

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