CSGP
CoStar Group Inc.Stock · Real EstateUS REITs 0.8% · S&P 500 Equal Weight 0.1% · Nasdaq Composite 0.03% · S&P 500 0.02% · Russell 3000 0.02% · Russell 1000 0.02% · US Stock Market 0.02% · MSCI ACWI 0.02% · MSCI World 0.01%$29.09-0.73%
as of market close, Sep 18, 2026
☾ AH $29.40 +1.07%
CoStar Group Inc. monthly returns
CoStar Group Inc. has averaged 1.68% per month, positive in 55% of months. Month-by-month returns for CoStar Group Inc. (CSGP) below, through September 18, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Average month
+1.7%
333 months
Best month
+86.1%
Jan 1999
Worst month
-36.9%
Feb 2001
Positive months
55%
of all months
CoStar Group Inc. monthly returns#
| Month | Path | Total return |
|---|---|---|
| Sep 2026 | -9.3% | |
| Aug 2026 | +11.5% | |
| Jul 2026 | +1.0% | |
| Jun 2026 | -11.5% | |
| May 2026 | -7.0% | |
| Apr 2026 | -14.2% | |
| Mar 2026 | -9.6% | |
| Feb 2026 | -27.4% | |
| Jan 2026 | -8.5% | |
| Dec 2025 | -2.3% | |
| Nov 2025 | -0.0% | |
| Oct 2025 | -18.4% | |
| Sep 2025 | -5.7% | |
| Aug 2025 | -6.0% | |
| Jul 2025 | +18.4% | |
| Jun 2025 | +9.3% | |
| May 2025 | -0.8% | |
| Apr 2025 | -6.4% | |
| Mar 2025 | +3.9% | |
| Feb 2025 | -0.5% | |
| Jan 2025 | +7.0% | |
| Dec 2024 | -12.0% | |
| Nov 2024 | +11.7% | |
| Oct 2024 | -3.5% | |
| Sep 2024 | -2.4% | |
| Aug 2024 | -0.9% | |
| Jul 2024 | +5.2% | |
| Jun 2024 | -5.2% | |
| May 2024 | -14.6% | |
| Apr 2024 | -5.2% | |
| Mar 2024 | +11.0% | |
| Feb 2024 | +4.3% | |
| Jan 2024 | -4.5% | |
| Dec 2023 | +5.2% | |
| Nov 2023 | +13.1% | |
| Oct 2023 | -4.5% | |
| Sep 2023 | -6.2% | |
| Aug 2023 | -2.4% | |
| Jul 2023 | -5.7% | |
| Jun 2023 | +12.1% | |
| May 2023 | +3.2% | |
| Apr 2023 | +11.8% | |
| Mar 2023 | -2.6% | |
| Feb 2023 | -9.3% | |
| Jan 2023 | +0.8% | |
| Dec 2022 | -4.6% | |
| Nov 2022 | -2.0% | |
| Oct 2022 | +18.8% | |
| Sep 2022 | +0.0% | |
| Aug 2022 | -4.1% | |
| Jul 2022 | +20.2% | |
| Jun 2022 | -0.9% | |
| May 2022 | -4.2% | |
| Apr 2022 | -4.5% | |
| Mar 2022 | +9.2% | |
| Feb 2022 | -13.0% | |
| Jan 2022 | -11.2% | |
| Dec 2021 | +1.6% | |
| Nov 2021 | -9.6% | |
| Oct 2021 | -0.0% | |
| Sep 2021 | +1.6% | |
| Aug 2021 | -4.6% | |
| Jul 2021 | +7.3% | |
| Jun 2021 | -3.0% | |
| May 2021 | -0.1% | |
| Apr 2021 | +4.0% | |
| Mar 2021 | -0.2% | |
| Feb 2021 | -8.4% | |
| Jan 2021 | -2.7% | |
| Dec 2020 | +1.5% | |
| Nov 2020 | +10.6% | |
| Oct 2020 | -2.9% | |
| Sep 2020 | -0.0% | |
| Aug 2020 | -0.1% | |
| Jul 2020 | +19.6% | |
| Jun 2020 | +8.2% | |
| May 2020 | +1.3% | |
| Apr 2020 | +10.4% | |
| Mar 2020 | -12.0% | |
| Feb 2020 | +2.2% | |
| Jan 2020 | +9.1% | |
| Dec 2019 | -2.4% | |
| Nov 2019 | +11.5% | |
| Oct 2019 | -7.4% | |
| Sep 2019 | -3.5% | |
| Aug 2019 | -0.1% | |
| Jul 2019 | +11.1% | |
| Jun 2019 | +8.7% | |
| May 2019 | +2.7% | |
| Apr 2019 | +6.4% | |
| Mar 2019 | +1.9% | |
| Feb 2019 | +17.1% | |
| Jan 2019 | +15.8% | |
| Dec 2018 | -8.7% | |
| Nov 2018 | +2.2% | |
| Oct 2018 | -14.1% | |
| Sep 2018 | -4.8% | |
| Aug 2018 | +6.3% | |
| Jul 2018 | +0.8% | |
| Jun 2018 | +8.2% | |
| May 2018 | +4.0% | |
| Apr 2018 | +1.1% | |
| Mar 2018 | +6.0% | |
| Feb 2018 | -1.1% | |
| Jan 2018 | +16.6% | |
| Dec 2017 | -2.6% | |
| Nov 2017 | +3.1% | |
| Oct 2017 | +10.3% | |
| Sep 2017 | -6.4% | |
| Aug 2017 | +4.0% | |
| Jul 2017 | +4.5% | |
| Jun 2017 | +0.8% | |
| May 2017 | +8.6% | |
| Apr 2017 | +16.2% | |
| Mar 2017 | +2.0% | |
| Feb 2017 | +0.5% | |
| Jan 2017 | +7.2% | |
| Dec 2016 | -1.4% | |
| Nov 2016 | +2.1% | |
| Oct 2016 | -13.6% |
Monthly total return (since Oct 2021)#
-20%-10%0%10%20%
Oct 2021-0.01%
Nov 2021-9.6%
Dec 2021+1.6%
Jan 2022-11%2022
Feb 2022-13%
Mar 2022+9.2%
Apr 2022-4.5%
May 2022-4.2%
Jun 2022-0.87%
Jul 2022+20%
Aug 2022-4.1%
Sep 2022+0.01%
Oct 2022+19%
Nov 2022-2.0%
Dec 2022-4.6%
Jan 2023+0.8%2023
Feb 2023-9.3%
Mar 2023-2.6%
Apr 2023+12%
May 2023+3.2%
Jun 2023+12%
Jul 2023-5.7%
Aug 2023-2.4%
Sep 2023-6.2%
Oct 2023-4.5%
Nov 2023+13%
Dec 2023+5.2%
Jan 2024-4.5%2024
Feb 2024+4.3%
Mar 2024+11%
Apr 2024-5.2%
May 2024-15%
Jun 2024-5.2%
Jul 2024+5.2%
Aug 2024-0.92%
Sep 2024-2.4%
Oct 2024-3.5%
Nov 2024+12%
Dec 2024-12%
Jan 2025+7.0%2025
Feb 2025-0.46%
Mar 2025+3.9%
Apr 2025-6.4%
May 2025-0.82%
Jun 2025+9.3%
Jul 2025+18%
Aug 2025-6.0%
Sep 2025-5.7%
Oct 2025-18%
Nov 2025-0.01%
Dec 2025-2.3%
Jan 2026-8.5%2026
Feb 2026-27%
Mar 2026-9.6%
Apr 2026-14%
May 2026-7.0%
Jun 2026-12%
Jul 2026+0.97%
Aug 2026+12%
Sep 2026-9.3%
Methodology#
Monthly returns are total returns (dividends reinvested), computed from CSGP's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
FAQ#
- What is CoStar Group Inc.'s average monthly return?
- CoStar Group Inc. (CSGP) has averaged about 1.68% per month, positive in roughly 55% of months. The best month was Jan 1999 (+86.1%) and the worst was Feb 2001 (-36.9%).
More on CoStar Group Inc.
By month for: S&P 500 · S&P 500 Equal Weight · US Stock Market · Nasdaq-100