Unusual Options Activity
CSGP Unusual Options Activity - CoStar
- Last active day
- August 21, 2026
- Active days (30d)
- 14
- Biggest recent print
- Put $35.0000 · $380K
AI summary
On August 21, 2026, CoStar Group, Inc. (CSGP) recorded notable options activity with a significant put transaction. A single print involved a put option with a strike price of $35, expiring on March 19, 2027, which generated a premium of $379,890. The volume-to-open interest ratio for this transaction stands at 5.1, indicating a relatively active position compared to existing open interest. Over the past 30 days, CSGP has experienced options activity on 14 days, reflecting ongoing interest in its options market. The absence of call premiums in this instance highlights a focus on bearish sentiment among traders, as evidenced by the substantial put premium recorded. Overall, this activity may suggest a strategic positioning in anticipation of future price movements for CoStar Group, although no specific directional implications can be drawn from the data alone.
AI-generated summary
Prints on August 21, 2026
| Ticker | Side | Strike | Expiry | Vol/OI | Premium | IV | New |
|---|---|---|---|---|---|---|---|
| CSGP | Put | $35.0000 | 03/19/27 (211d) | 5.1× | $380K | 50% |
History
- 2026-08-211 prints$0K calls$380K puts
- 2026-08-201 prints$0K calls$380K puts
- 2026-08-132 prints$609K calls$722K puts
- 2026-08-123 prints$609K calls$972K puts
- 2026-08-111 prints$0K calls$250K puts
- 2026-08-101 prints$0K calls$271K puts
- 2026-08-071 prints$0K calls$271K puts
- 2026-08-041 prints$0K calls$347K puts
- 2026-08-031 prints$0K calls$347K puts
- 2026-07-311 prints$0K calls$154K puts
- 2026-07-301 prints$0K calls$154K puts
- 2026-07-282 prints$278K calls$115K puts
- 2026-07-272 prints$278K calls$115K puts
- 2026-07-221 prints$0K calls$473K puts
- 2026-07-211 prints$0K calls$473K puts
- 2026-06-301 prints$95K calls$0K puts
- 2026-06-291 prints$95K calls$0K puts
- 2026-06-172 prints$138K calls$488K puts
- 2026-06-162 prints$138K calls$488K puts
- 2026-06-121 prints$0K calls$146K puts
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