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Annual Report and Accounts 2006 - DCC plc

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notes to the financial statements672. Financial risk management - continued(iii) Liquidity riskThe Group maintains a strong balance sheet with long term debt funding <strong>and</strong> cash balances with deposit maturities up tosix months. In addition, the Group maintains significant uncommitted credit lines with its relationship banks.(iv) Cash flow <strong>and</strong> fair value interest rate riskThe Group borrows at both fixed <strong>and</strong> floating rates of interest. The Group has swapped its fixed rate borrowings tofloating interest rates, using interest rate <strong>and</strong> cross currency interest rate swaps which qualify for fair value hedgeaccounting under IAS 39. The Group mitigates interest rate risk on its borrowings by matching, to the extent possible, thematurity of its cash balances with the interest rate reset periods on the swaps related to its borrowings.The Group also utilises interest rate swaps to swap certain floating rate sterling assets <strong>and</strong> liabilities into fixed rate sterlingassets <strong>and</strong> liabilities. The notional principal amounts on these swaps offset.Fair value estimationThe fair value of financial instruments traded in active markets is based on quoted market prices at the balance sheet date.The quoted market price used for financial assets held by the Group is the current bid price.The fair value of financial instruments that are not traded in an active market (for example, over-the-counter derivatives) isdetermined by using valuation techniques. The Group uses a variety of techniques <strong>and</strong> makes assumptions that are basedon market conditions existing at each balance sheet date. Quoted market prices or dealer quotes for similar instrumentsare used for long-term debt. Other techniques, such as estimated discounted cash flows, are used to determine fair valuefor the remaining financial instruments. The fair value of interest rate swaps is calculated as the present value of theestimated future cash flows. The fair value of forward foreign exchange contracts is determined using quoted forwardexchange rates at the balance sheet date.The nominal value less impairment provision of trade receivables <strong>and</strong> payables are assumed to approximate their fair values.

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