Monthly Returns (%)CoStar Group Inc
| Years | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2024 | -4.5 | 4.3 | 11 | -12.8 | -7.1 | -5.1 | 5.3 | -1.4 | 0 | 0 | 0 | -12.1 | -18.1 |
| 2023 | 0.8 | -9.3 | -2.6 | 11.8 | 3.2 | 12.1 | -5.7 | -2.4 | -6.2 | -4.5 | 13.1 | 5.2 | 13.1 |
| 2022 | -11.2 | -13 | 9.2 | -4.5 | -4.2 | -0.9 | 20.2 | -3.8 | -0.3 | 18.8 | -2 | -4.6 | -2.2 |
| 2021 | -2.7 | -8.4 | -1.1 | 6.6 | -1.7 | -90.3 | 7.3 | -4.6 | 1.6 | -0 | -9.6 | 1.6 | -91.5 |
| 2020 | 10.4 | 0.4 | -10.7 | 10.4 | 1.3 | 8.2 | 19.6 | 0.6 | 0.3 | -4 | 10.6 | 1.5 | 55.8 |
| 2019 | 15.8 | 17.1 | 1.9 | 5.3 | 3.3 | 7.2 | 13.3 | -1.7 | -3.8 | -5.3 | 11.2 | -3.5 | 75.8 |
| 2018 | 16.6 | -1.2 | 6 | 1.1 | 4 | 8.2 | 0.8 | 6.3 | -4.8 | -14.1 | 2.2 | -8.7 | 13.6 |
| 2017 | 7.2 | 0.5 | 2 | 16.3 | 8.6 | 0.8 | 4.5 | 4 | -6.4 | 10.3 | 3.1 | -2.6 | 57.5 |
| 2016 | -15.2 | 1 | 6.3 | 4.9 | 4.7 | 5.8 | -4.9 | -0.3 | 4.5 | -13.6 | 2.1 | -1.4 | -8.8 |
| 2015 | 0.5 | 7.9 | -0.7 | 3.3 | 2.2 | -3.7 | 0 | -12.1 | -2.3 | 17.3 | 3 | -1.2 | 12.6 |
| 2014 | -6.8 | 16.9 | -7.1 | -13.8 | -1.5 | -0.2 | -9.1 | 0.7 | 7.5 | 3.6 | 5.7 | 7.9 | -0.5 |
| 2013 | 4.9 | 7.4 | 8.7 | -1 | 3.1 | 15.4 | 21.3 | -5.1 | 13.1 | 5.4 | 5.2 | -0.9 | 106.5 |
| 2012 | -15.1 | 5.8 | 15.1 | 5.6 | 1.4 | 9.9 | 1.6 | -1.6 | 0.4 | 1.7 | 4.8 | 2.9 | 33.9 |
| 2011 | -2.2 | 0.7 | 10.6 | 8.5 | -7.2 | -6.1 | -0.9 | -12.9 | 1.5 | 18.4 | 8.1 | 0.3 | 15.9 |
| 2010 | -3.3 | -2.6 | 5.5 | 5.9 | -7.2 | -4.8 | 13 | -5.8 | 18 | 2 | 6.2 | 9.1 | 37.8 |
| 2009 | -10.1 | -13.9 | 18.6 | 22.5 | -3.8 | 11.8 | -7.9 | 3.3 | 8.7 | -5.8 | 2.3 | 5.1 | 26.8 |
| 2008 | -10.4 | -1.9 | 3.6 | 11.5 | -2.2 | -5.2 | 12.2 | 5.9 | -14.1 | -20.6 | -9.4 | 1 | -30.3 |
| 2007 | -11.4 | -1.3 | -4.7 | 9.2 | 11.2 | -2.5 | -3.6 | 7.9 | -2.9 | 7.6 | -16.2 | -2 | -11.8 |
| 2006 | 15.8 | 3.2 | 0.5 | 8.8 | -5.5 | 12.2 | -27.5 | -7.1 | 2.6 | 14.6 | 4.1 | 8.6 | 24.1 |
| 2005 | -7 | -14.3 | 0.1 | 7.3 | 1.6 | 8.5 | 8.9 | -1.6 | -0.1 | 2.6 | -2.1 | -8 | -6.5 |
| 2004 | -1 | -5.6 | -5.5 | 6.8 | 5.1 | 11 | -7.6 | -0.4 | 16.3 | -17.9 | 8.5 | 5.4 | 10.7 |
| 2003 | 9.2 | 2.2 | 7 | 1 | 26.5 | 5.4 | 2.2 | -1.9 | -12.1 | 43.9 | 11.6 | -0.7 | 126 |
| 2002 | -3.2 | -22.4 | 26.2 | 4.6 | -10.8 | -3.3 | 2.3 | 14.7 | -25.3 | -9.2 | 10 | 2.6 | -23.2 |
| 2001 | 19.8 | -36.8 | 7 | 21.5 | 8 | 4.8 | 3.1 | -7.8 | -28.2 | 3.2 | 4.5 | 24 | 1.6 |
| 2000 | -10.1 | 12.8 | 1.4 | -35 | -12.6 | 19.7 | 46.4 | -24.7 | 33.9 | -15.5 | -28.6 | 5.9 | -34.1 |
| 1999 | 86.1 | -15.7 | 47.7 | 34 | -7.5 | 20 | -12.1 | -25 | -16.8 | 3.1 | -6.6 | 56 | 184.1 |
| 1998 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | -38.3 | 16.9 | 8.1 | 7.4 | 40.3 | 0 |