Monthly Returns (%)21Vianet Group Inc
| Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2011 | 0 | 0 | 0 | 0 | -20.3 | 11.1 | -4.3 | -8.6 | -15.6 | -12.6 | 11.2 | -7.2 | 0 |
| 2012 | 17.2 | 13.3 | -6.6 | 15.7 | -11.8 | -1.1 | -12.1 | 1.4 | 13.1 | -4 | -11.8 | -1.6 | 5 |
| 2013 | 3.2 | -2.3 | -3 | -3.8 | 1.1 | 24 | 13.3 | 5.5 | 21.7 | 9.2 | -0.8 | 31.8 | 144.8 |
| 2014 | -4 | 15.2 | 10.4 | -16.3 | 12.2 | 11.2 | -7.1 | -1.9 | -34.1 | 16.2 | -10 | -17.8 | -34.2 |
| 2015 | 7 | 4.5 | 2.1 | 16.5 | -12.2 | 13.6 | -1.3 | -12.2 | 2.8 | 9.6 | 3.9 | 1.5 | 36.7 |
| 2016 | -9.2 | -8.5 | 13.7 | 1.1 | -28.1 | -29.7 | -6.2 | -3.2 | -14.2 | -8.1 | 7.4 | -10.7 | -66.8 |
| 2017 | 2.3 | 0.8 | -24.1 | -1.5 | -1.1 | -6.2 | -11.2 | 16.4 | 9.6 | 32 | -4.9 | 11.8 | 13.8 |
| 2018 | 14.2 | -16.3 | -9.2 | -24 | 56.9 | 17.3 | -2.7 | 3.3 | 3.6 | 7.7 | -12.9 | -8.9 | 8.3 |
| 2019 | 3.9 | 5.1 | -15.9 | -0.1 | -10 | 11.1 | -6.4 | 3 | 1 | 6.4 | -18.5 | 2.8 | -20.3 |
| 2020 | 35.1 | 60.8 | -7.4 | 8 | -2.5 | 63.4 | -8.9 | 5.7 | 0.8 | -0.9 | 26.6 | 19.1 | 402.3 |
| 2021 | 7 | -1.6 | -11.4 | -13.6 | -20 | 2.8 | -24.5 | 14.2 | -12.5 | -9.4 | -38 | -7.1 | -73.9 |
| 2022 | 9.9 | -20.7 | -25.9 | 4.8 | -7.5 | 6.9 | -15.6 | 4.9 | 2.8 | -23.8 | 19.6 | 13.2 | -37.2 |
| 2023 | 3.7 | -32.5 | -18.4 | -9.3 | -12.6 | 12.8 | 2.4 | 26.3 | -16.5 | 2.7 | -12.9 | 2.5 | -49.4 |
| 2024 | -40.8 | -8.8 | 0 | 16.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -13.2 |