Public Storage (PSA), a leading real estate investment trust (REIT) operating self-storage facilities, reported first quarter 2011 FFO (funds from operations) of $1.48 per share, compared with $0.78 in the year-earlier quarter. Fund from operations, a widely used metric to gauge the performance of REITs, is obtained after adding depreciation and amortization and other non-cash [...] (PSA) Public Storage Quarterly Report Misses Estimates