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Net Financial Operating Income (Details) $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) | Dec. 31, 2017 CLP ($) | Dec. 31, 2016 CLP ($) | Dec. 31, 2015 CLP ($)
Net Financial Operating Income |  |  |  |
Income on trading securities |  | $ 46,207 | $ 42,415 | $ 12,770
Gain (loss) from mark to market |  | 4,435 | 9,554 | (2,132)
Financial assets held-for-trading |  | 50,642 | 51,969 | 10,638
Sale of available-for-sale instruments |  | 6,514 | 65,320 | 8,861
Sale of loan portfolio |  | 2,063 | 4,930 | 4,130
Net (loss) gain of other transactions |  | 233 | 752 | 1,687
Derivative instruments |  | (89,113) | 5,604 | 19,096
Total | $ (48,195) | $ (29,661) | $ 128,575 | $ 44,412

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- Definition Represents the amount of gains (losses) on loan portfolio sales. + References No definition available. + Details
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