Middle East tensions may stall global economic recovery.
American Assets Trust was first IPO of 2011.
Growth projected for hotel REITs.
Benefits of green building extend beyond the environment.
Office and multifamily markets show signs of growth.
Ventas transaction will create largest health care REIT in the U.S.
Company has made $1.3 billion in investments in 2011.
Fourth quarter of 2010 shows positive developments.