Monthly Returns (%)Cogent Communications Holdings Inc
| Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2006 | 0 | 0 | 0 | 8.2 | -12.9 | 1.9 | -4.3 | 3.5 | 24.9 | 22.2 | 11.9 | 2.3 | 0 |
| 2007 | 29.5 | 7.4 | 4.7 | 7.8 | 12.7 | 4.1 | -4 | -12.9 | -6.6 | 18.6 | -25 | 14.2 | 46.2 |
| 2008 | -13.7 | -4.8 | -6 | 14.8 | -21.7 | -18.5 | -10 | -23.7 | -16.1 | -38.1 | 15.1 | 18.7 | -72.5 |
| 2009 | 1.8 | -0.4 | 8.8 | 17.1 | -7.4 | 4.4 | 1.7 | 16.4 | 17.1 | -10.3 | -16 | 15.8 | 50.9 |
| 2010 | 10.8 | -9.8 | 5.7 | -2.2 | -11.1 | -16.3 | 13.7 | 1.2 | 8.6 | 14.6 | 11.7 | 16.6 | 43.5 |
| 2011 | -3.5 | 8 | -3.3 | 1.8 | 7.2 | 9.4 | -11.4 | -5.9 | -5.1 | 19.3 | 5.9 | -0.7 | 19.5 |
| 2012 | -9.8 | 20.8 | 3.6 | -1.8 | -5.3 | 8.4 | -4 | 6.7 | 17.3 | -5.6 | -2.1 | 7.1 | 35.4 |
| 2013 | 9.4 | 2 | 5 | 8.5 | -3.6 | 2.4 | 1.6 | 8.4 | 4.4 | 8.9 | 12.2 | 3.6 | 82.8 |
| 2014 | 2.4 | -7.3 | -6.4 | -3 | 6.9 | -5.8 | 0.5 | 0.7 | -3 | 1 | 5.3 | -0.1 | -9.6 |
| 2015 | 4.7 | -0.9 | -2.8 | -1 | -9 | 7.7 | -6 | -11.6 | -2.2 | 13.1 | 10.4 | 3.4 | 2.5 |
| 2016 | -3.7 | 9.9 | 7.4 | -0.8 | 3.9 | 0.6 | 6.7 | -16 | 3.6 | 0.2 | 2.5 | 10.4 | 24.1 |
| 2017 | 1.1 | -0.8 | 5 | 4.5 | -11.5 | 1.8 | 4.1 | 12.8 | 4.9 | 10.2 | -12.2 | -3.3 | 14.3 |
| 2018 | -0.5 | -5 | 2.5 | 8.6 | 9.7 | 4.3 | -2.7 | 6.4 | 2 | -6.9 | -5.6 | -6.8 | 4.2 |
| 2019 | 7.2 | 0.5 | 11.4 | 1.8 | 6.1 | 1 | 7.7 | -4.5 | -9.2 | 4.7 | 8.4 | 6 | 47.1 |
| 2020 | 9.3 | 2.2 | 10.4 | 2.3 | -8.7 | 1.1 | 16.5 | -25.4 | -10.7 | -7.1 | 4.2 | 3 | -9.9 |
| 2021 | -5.1 | 5.4 | 14.9 | 9.8 | 0.1 | 1.7 | 0.8 | -6.4 | -2.4 | 8.1 | -2.1 | -2.5 | 22.2 |
| 2022 | -13.1 | -0.3 | 4.7 | -10.3 | 1.5 | 0.6 | 5 | -16.6 | -2.1 | -0.9 | 12.3 | -1.7 | -22 |
| 2023 | 20.1 | -5.6 | -1.6 | 8.4 | -10.9 | 9.4 | -9 | 15.3 | -12.3 | 5 | -1.7 | 19.1 | 33.3 |
| 2024 | 1.5 | 4.8 | -19.2 | -3.2 | -6.4 | -8.8 | 30.6 | -0.7 | 0 | 0 | 0 | -6.2 | 1.4 |
| 2025 | -1.9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -1.9 |