The calculations were made considering a parallel movement of US$ 5 per barrel in the curve of the BRENT and JET crude futures benchmark price at the end of December 2017 and the end of December, 2016.
| Positions as of December 31, 2017 | Positions as of December 31, 2016 | |||
| Benchmark price | effect on equity | effect on equity | ||
| (US$ per barrel) | (millions of US$) | (millions of US$) | ||
| +5 | +1.8 | +3.12 | ||
| -5 | - 3.3 | -4.78 |