We are exposed to market risk from foreign currency exchange rates and interest rates, which could affect operating results, financial position and cash flows. We manage our exposure to these market risks through our regular operating and financing activities and, when appropriate, through the use of derivative financial instruments. We utilized derivative financial instruments to hedge economic exposures, as well as reduce earnings and cash flow volatility resulting from shifts in market rates.
Recent market events have not caused us to materially modify or change our financial risk management strategies with respect to our exposures to interest rate and foreign currency risk. Refer to Note 13 – Financial Instruments in the Consolidated Financial Statements for additional discussion on our financial risk management.
Assuming a 10% appreciation or depreciation in foreign currency exchange rates from the quoted foreign currency exchange rates at December 31, 2010, the potential change in the fair value of foreign currency-denominated assets and liabilities in each entity would not be significant because all material currency asset and liability exposures were economically hedged as of December 31, 2010. A 10% appreciation or depreciation of the U.S.Dollar against all currencies from the quoted foreign currency exchange rates at December 31, 2010 would have a $528 million impact on our cumulative translation adjustment portion of equity. The net amount invested in foreign subsidiaries and affiliates, primarily Xerox Limited, Fuji Xerox, Xerox Canada Inc. and Xerox do Brasil, and translated into U.S. Dollars using the year-end exchange rates, was $5.3 billion at December 31, 2010.
The consolidated weighted-average interest rates related to our total debt and liability to subsidiary trust issuing preferred securities for 2010, 2009 and 2008 approximated 5.8%, 6.1%, and 6.6%, respectively. Interest expense includes the impact of our interest rate derivatives.
Virtually all customer-financing assets earn fixed rates of interest. The interest rates on a significant portion of the Company’s term debt are fixed.
As of December 31, 2010, $952 million of our total debt carried variable interest rates, including the effect of pay variable interest rate swaps we use to reduce the effective interest rate on our fixed coupon debt.
The fair market values of our fixed-rate financial instruments are sensitive to changes in interest rates. At December 31, 2010, a 10% change in market interest rates would change the fair values of such financial instruments by approximately $194 million.