Put-Call Ratio (Volume) (120-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Quantum-Si Incorporated (QSI) had 120-Day Put-Call Ratio (Volume) of 0.1499 for 2026-10-19.

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Figures for 2026-10-19

Volatility Metrics
Historical Volatility (Close-to-Close)	1.0812
Historical Volatility (Parkinson)	0.9550
Implied Volatility (Calls)	1.2520
Implied Volatility (Puts)	1.3932
Implied Volatility (Mean)	1.3226
Put-Call Implied Volatility Ratio	1.1128
Implied Volatility Skew	0.0781
Option Statistics
Put-Call Ratio (Volume)	0.1499
Put-Call Ratio (Open Interest)	0.0960