Cerus (CERS) Options Chain
NASDAQ: CERSHealth CareMedical/Dental InstrumentsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Dec 18, 2026
- Days to expiration
- 68
- Share price
- $2.30
- Put/call ratio (OI)
- 0.22
- Put/call ratio (volume)
- 1.41
- Expected move
- ±$0.7911
- Open interest (C / P)
- 2.17K / 468
CERS options summary
The CERS options chain for the December 18, 2026 expiration lists 6 call and 5 put contracts, with 68 days until expiration. Open interest stands at 2,173 calls and 468 puts, a put/call ratio of 0.22, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 79.7%, which implies the market expects a move of about ±$0.7911 (34.4%) in Cerus stock by expiration.
The most open interest sits at the $4.00 call (1.10K contracts) and the $1.50 put (202 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CERS options chain · December 18, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| — | — | — | 0.50 | 0.00 | 0.00 | 0.20 | |||||
| 1.40 | 0.00 | 0.00 | 1.00 | 0.00 | 1.00 | 0.01 | |||||
| 0.90 | 0.40 | 1.35 | 1.50 | 0.00 | 1.00 | 0.25 | |||||
| 0.05 | 0.00 | 0.70 | 2.00 | 0.00 | 0.00 | 0.20 | |||||
| 0.10 | 0.00 | 0.35 | 3.00 | 0.15 | 1.05 | 1.00 | |||||
| 0.04 | 0.00 | 0.05 | 4.00 | — | — | — | |||||
| 0.05 | 0.00 | 0.00 | 5.00 | — | — | — | |||||
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 CERS put/call ratio?
For the December 18, 2026 expiration, the CERS put/call ratio based on open interest is 0.22 (468 puts vs 2,173 calls), and 1.41 based on today's volume. A ratio above 1 means more puts than calls.
What is CERS's implied volatility?
At-the-money implied volatility for CERS options expiring December 18, 2026 is about 79.7%, an annualized estimate of how much the market expects Cerus stock to move.
How many CERS option expiration dates are there?
CERS has 5 listed expiration dates, from Oct 16, 2026 to May 21, 2027.
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.