Inflation risk arises as changes to inflation rates cause future cash flows from financial instruments to fluctuate. The index linked long-term debt at Bristol Water is subject to inflation risk. Inflation risk is mitigated by the indexation to RPI included in the determination of Bristol Water's regulated revenue. Refer to note 19 (c)(ii) for further detail on this debt. The Corporation's exposure to foreign currency exchange risk is primarily related to the investment in Bristol Water, Värmevärden and the SEK-denominated shareholder loan with Värmevärden. The power segment also has expenses and capital commitments exposed to foreign currency exchange risk. Changes in the Canadian dollar and UK pound sterling currency rates impact the carrying value of assets, liabilities and components of the  consolidated statement of income. Bristol Water has a foreign functional currency requiring movements in the UK pound sterling to be reflected by the Corporation on consolidation. Capstone is also exposed to foreign exchange risk from the translation of foreign monetary assets. Changes in the Canadian dollar and SEK currency  rates impact the value of the shareholder loan with Värmevärden resulting in a foreign exchange gain or loss which is included in the consolidated  statement of income. Capstone's power assets have expenses or capital commitments in currencies other than the Canadian dollars and expects that as new projects are built additional purchases will be made in foreign currencies. To mitigate these risks Capstone monitors the risk associated with foreign exchange  rate fluctuations and, from time to time may enter into forward foreign exchange contracts or employ other hedging strategies. As at December 31, 2013, Capstone did not hold any foreign exchange contracts to hedge these purchase commitments. Credit risk is the risk that one party to a financial instrument will cause a financial loss for the other party by failing to honour a financial obligation. Financial instruments that potentially subject the Corporation to concentrations of credit risk consist of cash and cash equivalents, restricted cash,  short-term deposits, accounts and loans receivable and derivative contracts. The Corporation deposits its cash and holds its short-term investments with reputable financial institutions and limits the exposure by counterparty,  therefore management believes the risk of loss to be remote. Credit risk concentration with respect to power trade receivables is limited due to the Corporation's customer base being predominantly government authorities. The table below summarizes power trade receivables from the sale of electricity by counterparty: There are no accounts receivable that are past due. Since the OPA and OEFC are government agencies, management considers credit risk to be minimal. Bristol Water is required to supply water to all customers in its licenced area. Consequently, for residential customers Bristol Water is not able to  disconnect services in the event of non-payment. For commercial customers, Bristol Water has the right of disconnection in the event of non- payment. For all customers, Bristol Water has implemented policies and procedures to assess the risk of non-payment, recoup debts and establish appropriate provisions. The Corporation's derivative agreements expose Capstone to losses under certain circumstances, such as the counterparty defaulting on its  obligations under the swap agreements or if the swap agreements provide an imperfect hedge. Counterparties to the Corporation's derivative contracts are major financial institutions that have been accorded investment grade ratings. Consequently, management believes there to be minimal  credit risk associated with its derivative contracts. Economic dependence arises when an enterprise relies on a significant volume of business with another party that cannot be easily transferred at  similar terms and conditions or is abnormal relative to expectations of similar entities. The table below summarizes revenue from the sale of  electricity by counterparty for the power segment: 2013 ANNUAL REPORT  75 For the year ended Dec 31, 2013 Dec 31, 2012 Ontario Power Authority ("OPA") 3,408 3,975 Ontario Electricity Financial Corporation ("OEFC") 24,654 23,948 Other 7,754 3,983 35,816 31,906 (B) Credit Risk Foreign currency exchange risk (C) Economic Dependence