CoStar Group (CSGP) Options Chain
NASDAQ: CSGPFinanceReal EstateUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Sep 17, 2027
- Days to expiration
- 341
- Share price
- $29.67
- Put/call ratio (OI)
- 2.82
- Put/call ratio (volume)
- 6.20
- Expected move
- ±$15.68
- Open interest (C / P)
- 94 / 265
CSGP options summary
The CSGP options chain for the September 17, 2027 expiration lists 5 call and 5 put contracts, with 341 days until expiration. Open interest stands at 94 calls and 265 puts, a put/call ratio of 2.82, which is more bearish, with puts outnumbering calls. At-the-money implied volatility near the $30.00 strike is 54.7%, which implies the market expects a move of about ±$15.68 (52.8%) in CoStar Group stock by expiration.
The most open interest sits at the $50.00 call (61 contracts) and the $25.00 put (203 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CSGP options chain · September 17, 2027
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 13.50 | 13.40 | 14.90 | 17.50 | 0.85 | 1.35 | 1.10 | |||||
| — | — | — | 20.00 | 1.35 | 1.95 | 1.42 | |||||
| — | — | — | 22.50 | 2.05 | 2.60 | 2.34 | |||||
| 10.00 | 8.50 | 9.60 | 25.00 | 2.90 | 3.50 | 3.40 | |||||
| 4.74 | 6.00 | 7.10 | 30.00 | 5.20 | 5.90 | 5.50 | |||||
| 3.70 | 4.20 | 5.00 | 35.00 | — | — | — | |||||
| 1.45 | 1.55 | 1.90 | 50.00 | — | — | — | |||||
In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.
Frequently asked questions
What is the CSGP put/call ratio?
For the September 17, 2027 expiration, the CSGP put/call ratio based on open interest is 2.82 (265 puts vs 94 calls), and 6.20 based on today's volume. A ratio above 1 means more puts than calls.
What is CSGP's implied volatility?
At-the-money implied volatility for CSGP options expiring September 17, 2027 is about 54.7%, an annualized estimate of how much the market expects CoStar Group stock to move.
How many CSGP option expiration dates are there?
CSGP has 10 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.
What does "in the money" mean?
A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.