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$CSGP Bearish pressure building up in the options market. On-Balance net option delta is -100 K.

CSGP 52.81-8.37 (-13.7%)Costar Group

  • ATM straddle for 20-Feb-26 expiration returned a positive 69.9% from the previous business day
  • The upside wing (25 delta calls) declined -91.4%
  • Downside put (25 delta puts) gained 482.6%
  • The option volume for 20-Feb-26 expiration is 16,478
Unusual Option Volume

CSGP Costar Group54.12-7.06 (-11.5%)

Costar Group trades 17,262 contracts. The highest volume is in the 20-Feb-26 50 puts.
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Unusual Option Volume

CSGP Costar Group69.14+3.33 (+5.1%)

Costar Group trades 1,910 contracts. The highest volume is in the 18-Jun-26 70 calls, which is 1.2% above the current price. News: Third Point Sends Letter to Board of Directors of CoStar Group
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Unusual Option Volume

CSGP Costar Group66.83+2.06 (+3.2%)

Costar Group trades 4,981 contracts. News: CoStar Group Founder and CEO Andy Florance Earns Top Ten Placement on the 2026 SP 200
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Sentiment Alert: CSGP Increasing bullish pressure with an imbalance in net option delta of 247 K.
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