| 2017 | 2016 | 2015 |
| In millions of COP | ||
Debt investments, net | 159,890 | 163,311 | 71,091 |
Net gains from investment activities at fair value through income statement | | | |
Debt investments | 699,841 | 579,403 | 294,979 |
Derivatives | (61,667) | (4,750) | 31,835 |
Spot transactions | 3,517 | (22,831) | (48,961) |
Repos | (116,268) | (7,638) | (50,081) |
Others | - | - | 2,977 |
Total net gains from investment activities at fair value through profit and loss | 525,423 | 544,184 | 230,749 |
Total Interest on investment securities | 685,313 | 707,495 | 301,840 |