Item 7A. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to certain market risks inherent in our operations. These risks generally arise from transactions entered into in the normal course of business. We believe our primary market risk exposure relates to interest rate risk. Derivatives are not entered into for speculative purposes.

The table below provides information about our liabilities sensitive to changes in interest rates as of December 31, 2012 and 2011:

We have historically used variable rate indebtedness available under our revolving credit facility to initially fund acquisitions and our development pipeline. To the extent we utilize our revolving credit facility and increase our variable rate indebtedness, our exposure to increases in interest rates will also increase.

For fixed rate debt, interest rate changes affect the fair market value but do not impact net income attributable to common shareholders or cash flows. Conversely, for floating rate debt, interest rate changes generally do not affect the fair market value but do impact net income attributable to common shareholders and cash flows, assuming other factors are held constant. Holding other variables constant, a one percentage point variance in interest rates would change the unrealized fair market value of the fixed rate debt by approximately $140.3 million. The net income attributable to common shareholders and cash flows impact on the next year resulting from a one percentage point variance in interest rates on floating rate debt would be approximately $2.1 million, holding all other variables constant.

We have entered into, and may enter into in the future, interest rate swaps and caps to protect ourselves against fluctuations in the rates of our floating rate debt. In connection with the repayment of the $500 million loan in June 2011, we discontinued the hedging relationship on the $500 million interest rate swap on May 31, 2011. Upon repayment of the loan, which eliminated the probable future variable monthly interest payments being hedged, we recognized a non-cash charge of approximately $29.8 million which included the accelerated reclassification of amounts previously recorded in accumulated other comprehensive loss related to this swap. This interest rate swap matured in October 2012 and settled. The changes in fair value of this swap were marked to market through earnings in other income and other expense. During 2012, we recorded a net loss of approximately $0.7 million related to this derivative instrument through the settlement date.