CSGP

+7.9%🔴 Potential overreaction

CoStar Group Inc · Technology

$32.48Vol 3.30M · 0.6× normalMkt cap +$0.96Blive · 2026-10-15 ET

What happened

Move

+7.9%

Price

$32.48

Volume

3.30M

0.6× normal

Market cap

$13.16B

+$0.96B today

Why it moved

No clear catalyst identified

No reliable news, earnings or analyst driver was found for this move. A move this size without an obvious driver is most likely flow/positioning-driven rather than a fundamentals story.

Verdict — was the move justified?

🔴 Potential overreaction

A 3.2σ move well beyond the sector with no identified fundamental or news driver — the reaction appears larger than currently visible evidence justifies. Likely flow/positioning-driven.

How unusual is this move

σ score

3.2σ

vs own 20d volatility

Percentile

99th

of 1278 daily moves

Avg daily move

±1.6%

own 5y average

vs sector

+7.3%

beyond sector median

Today’s move is among the largest 1% of CSGP’s daily moves over the last 5 years — while the sector moved +0.5% and the market +1.2%.

What happened after similar moves

22 similar up moves in CSGP’s 5-year history:

After 5 days

-1.4%

43% higher

After 20 days

-2.8%

29% higher

Median of same-direction moves within ±35% magnitude band. Past patterns don’t predict outcomes — context, not signal.

Fundamental context

V 30G 45P 21H 100Q 77EW 39/65

Insider activity (90d): net buying $2.24M

Valuation context

P/E (TTM)

165.8

5y median 131.9

P/E percentile

64%

vs own 5y history

FCF yield

0.0%

Valuation sits near the middle of its own historical range (64th percentile).

Full fundamental analysis on PreMarketPrice

Pillar scores, financial statements, valuation history, news & more for CSGP

→