NOTE 23 — OTHER FINANCIAL INCOME (LOSS)
| December 31, | ||||||||||||
| 2017 | 2016 | 2015 | ||||||||||
| (In millions of US$) | ||||||||||||
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Exchange gains (losses) net |
28.1 | 12.6 | (20.5 | ) | ||||||||
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Other financial income (expenses) |
(23.9 | ) | (24.0 | ) | (34.0 | ) | ||||||
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Other financial income (loss) |
4.2 | (11.4 | ) | (54.5 | ) | |||||||
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In 2017, other financial expenses include US$4.3 million depreciation of our financial stake in Geokinetics Inc. (see note 7) and US$15.0 million of GSS loan discounting (see note 2).
In 2016, other financial expenses included a US$13.3 million expense related to a risk assessment on a loan to a subsidiary.
In 2016 and 2015, other financial expenses included respectively US$3.0 million and US$40.0 million expense related to an impairment of our shares in Geokinetics Inc (see note 7).