As of December 31, 2018, we had entered into 619 currency related derivative contracts with a notional amount of ₩34,494 billion and had entered into 462 interest rate related derivative contracts with a notional amount of ₩40,969 billion. In connection with our currency forwards and currency swaps, we had net valuation loss of ₩1,211 billion in 2018 and ₩628 billion in 2017, primarily due to the appreciation of the U.S. dollar against other currencies, which resulted in an increase in the value of our obligations denominated in the U.S. dollar. In connection with our interest rate swaps, we recorded net valuation loss of ₩411 billion in 2018 and ₩262 billion in 2017, primarily due to an increase in benchmark interest swap rates, such as the U.S. dollar interest swap rate in 2018, which resulted in a decrease in the value of ourfloating-for-fixed interest rate swaps. See “—Financial Statements and the Auditors—Notes to Separate Financial Statements as of and for the years ended December 31, 2018 and 2017—Note 20.”
Sources of Funding
We obtain funds primarily through borrowings from the issuance of bonds in both domestic and international capital markets, borrowings from domestic and foreign financial institutions, capital contributions and internally generated funds. Internally generated funds result from various activities we carried on and include principal and interest payments on our loans, fees from guarantee operations and other services, and income from marketable securities we hold.
We raised a net total of ₩54,005 billion (new borrowings plus loan repayments by our clients less repayment of our existing debt) during 2018, a 1% increase compared with the previous year’s ₩53,486 billion. The total loan repayments, including prepayments by our clients, during 2018 amounted to ₩50,616 billion, an increase of 7% from ₩47,448 billion during 2017.
Since our establishment, the Government has, from time to time, provided us with loans to support our lending to Korean exporters and provide liquidity to us. As of December 31, 2018, we had no outstanding borrowings from the Government. We also issuedWon-denominated domestic bonds in the aggregate amounts of ₩12,270 billion, ₩13,670 billion and ₩12,865 billion during 2016, 2017 and 2018, respectively.
We have diversified our funding sources by borrowing from various overseas sources and issuing long-term floating-rate notes and fixed-rate debentures in the international capital markets. These issues were in foreign currencies, including the U.S. dollar, Thai Baht, Malaysia Ringgit, Japanese Yen, Australian Dollar, Euro, Hong Kong Dollar, Singapore Dollar, Swiss Franc, Brazilian Real, Turkish Lira, Mexican Peso, Peruvian Sol, Indian Rupee, Indonesian Rupiah, Chinese Yuan, New Zealand Dollar, Saudi Riyal, Taiwan Dollar, Philippine Peso, Russian Ruble, South African Rand, Deutsche Mark, Danish Krone, Swedish Krona, Czech Koruna, Norwegian Krone, British Pound and Canadian Dollar and have original maturities ranging from one to thirty years.
During 2018, we issued Eurobonds in the aggregate principal amount of US$5,395 million in various types of currencies under our existing medium term notes program, an 11% increase from US$4,857 million in 2017. These bond issues consisted of offerings of US$1,291 million, HKD 1,300 million, BRL 2,606 million, EUR 850 million, CNY 4,920 million, INR 21,100 million, AUD 91.8 million, IDR 5,683,000 million, CHF 800 million and MXN 150 million.In addition, we issued global bonds during 2018 in the aggregate amount of US$2,500 million under our U.S. shelf registration statement (the “U.S. Shelf Program”) compared with US$3,500 million in 2017. As of December 31, 2018, the outstanding amounts of our notes and debentures were US$34,888 million, JPY 143,820 million, HKD 6,011 million, BRL 3,534 million, EUR 3,537 million, THB 10,300 million, CHF 1,200 million, AUD 3,726 million, INR 32,042 million, CNY 10,693 million, IDR 9,328,400 million, PEN 266 million, NZD 1,097 million, ZAR 654 million, NOK 2,250 million, GBP 60 million, CAD 690 million, SEK 250 million, MXN 150 million and SGD 200 million
We also borrow from foreign financial institutions in the form of loans that are principally made by syndicates of commercial banks at floating or fixed interest rates and in foreign currencies, with original
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