CoStar Group Inc. drawdown: 70.8% below the all-time high
CoStar Group Inc. is 70.8% below its all-time high, set Oct 26, 2021 (as of market close, Sep 18, 2026). The chart shows every day as a percentage of the highest level reached up to that point: 100% means a fresh record, everything below is a drawdown.
- Below all-time high
- −70.8%
- 29.2% of ATH
- All-time high
- $99.74
- Oct 26, 2021
- Time below the high
- 4.9 yrs
- since Oct 26, 2021
- Worst-ever drawdown
- −72.8%
- Jul 23, 2026
- Longest underwater
- 6.0 yrs
- between all-time highs
- Today's level first reached
- Oct 27, 2017
- 8.9 yrs ago
- Last time this deep
- Mar 23, 2001
- in a previous episode
% of all-time high since 1998#
The classic underwater chart (drawdown curve), drawn as % of the all-time high — 100% is a fresh record, everything below it is time spent underwater. Basis and range are in the URL, so a particular view is a link.
The deepest drawdowns on record#
Every decline of 15% or more from an all-time high (price basis), deepest first.
| Peak | Trough | Depth | Peak → trough | Recovered by | Underwater |
|---|---|---|---|---|---|
| Oct 26, 2021 | Jul 23, 2026 | −72.8% | 4.7 yrs | not yet | 4.9 yrs+ |
| Mar 13, 2000 | Mar 21, 2001 | −71.1% | 12 mo | Mar 29, 2006 | 6.0 yrs |
| Jul 12, 1999 | Oct 13, 1999 | −66.7% | 3 mo | Mar 10, 2000 | 8 mo |
| Oct 18, 2007 | Mar 9, 2009 | −60.7% | 17 mo | Mar 29, 2011 | 3.4 yrs |
| Jul 30, 1998 | Sep 11, 1998 | −49.4% | 43 days | Dec 17, 1998 | 5 mo |
| Jun 6, 2006 | Aug 24, 2006 | −37.1% | 3 mo | Oct 9, 2007 | 16 mo |
| May 12, 2011 | Aug 22, 2011 | −35.9% | 3 mo | Apr 27, 2012 | 12 mo |
| Mar 4, 2014 | Oct 13, 2014 | −35.7% | 7 mo | May 19, 2015 | 14 mo |
Price basis (no dividends) — the convention crash histories use. With dividends reinvested, recoveries arrive years earlier; switch the basis on the chart above to see it.
Drawdown vs what came next#
One dot per month since 1998: how far CoStar Group Inc. stood below its all-time high, and the total return over the following 1, 5 and 10 years.
Read this with survivorship bias in mind: a single asset's history is one surviving sample, so past recoveries here say little about the odds ahead. Monthly windows also overlap heavily (they are not independent samples). Not investment advice.
FAQ#
- How far is CoStar Group Inc. from its all-time high?
- CoStar Group Inc. is currently 70.8% below its all-time high, set Oct 26, 2021 (as of market close, Sep 18, 2026). Prices only, the convention headlines use; with dividends reinvested the gap is usually smaller.
- What was the biggest CoStar Group Inc. drawdown ever?
- The deepest decline on record in our data (since 1998) took CoStar Group Inc. 72.8% below its prior high, bottoming Jul 23, 2026. The table on this page lists every major episode with its peak, trough and recovery date.
Methodology & related#
Daily data since -1 from CSGP; no free deep history exists for CoStar Group Inc. — for a 150-year drawdown record see the S&P 500 drawdown page. The price basis excludes dividends; the total-return basis reinvests them; the real basis additionally deflates by CPI. See also returns by year. Past performance does not predict future returns; not investment advice.