What does the current Put/Call Ratio indicate about short-term market sentiment for CDNA options activity?

The suggestion to investigate recent options activity for CDNA is an excellent next step to gain a more dynamic perspective on market sentiment, complementing the static nature of the Put/Call Open Interest (OI) Ratio. While the 0.53 OI ratio for CDNA indicates a generally bullish sentiment from open positions, options flow provides insight into real-time trading activity and conviction.

Options Flow vs. Open Interest

• Open Interest (OI) Ratio: This metric reflects the total number of outstanding options contracts that have not yet been closed or exercised. A low put/call OI ratio, like CDNA's 0.53, suggests more open call positions than put positions, indicating a collective bullish leaning among options holders.1
• Options Flow/Unusual Activity: This refers to the actual trades occurring in the options market. Significant options flow, particularly large block trades or unusual volume in specific strike prices and expirations, can signal institutional activity or strong directional bets. Fintel provides tools to track "Options Flow - Real Time Feed" and identify "Unusual Options Activity" for stocks like CDNA.2

To corroborate the bullish sentiment suggested by the OI ratio, we would look for patterns in options flow such as:

• Large Call Purchases: A high volume of call options being bought, especially at or out-of-the-money, can indicate strong belief in an upward price movement.
• Unusual Call Volume: Spikes in call option volume that significantly exceed historical averages or open interest for particular strikes could point to informed trading or anticipation of a catalyst.1

Conversely, if options flow showed significant put buying despite a low OI ratio, it might suggest a divergence in short-term trading sentiment versus longer-term positioning, or hedging activity. Reviewing the "Options Flow" and "Unusual Options Activity" sections on Fintel's CDNA page would provide the granular data needed to confirm or challenge the sentiment derived from the OI ratio.