Cerus (CERS) Options Chain
NASDAQ: CERSHealth CareMedical/Dental InstrumentsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $2.30
- Put/call ratio (OI)
- 0.01
- Put/call ratio (volume)
- 0.09
- Expected move
- ±$0.7257
- Open interest (C / P)
- 819 / 7
CERS options summary
The CERS options chain for the November 20, 2026 expiration lists 7 call and 5 put contracts, with 40 days until expiration. Open interest stands at 819 calls and 7 puts, a put/call ratio of 0.01, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $2.00 strike is 95.3%, which implies the market expects a move of about ±$0.7257 (31.6%) in Cerus stock by expiration.
The most open interest sits at the $3.00 call (433 contracts) and the $2.00 put (3 contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CERS options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 2.12 | 1.50 | 2.15 | 0.50 | 0.00 | 0.00 | 0.36 | |||||
| 1.61 | 0.95 | 1.70 | 1.00 | — | — | — | |||||
| 0.65 | 0.90 | 1.85 | 1.50 | 0.00 | 1.00 | 0.05 | |||||
| 0.05 | 0.10 | 0.70 | 2.00 | 0.00 | 0.40 | 0.10 | |||||
| 0.07 | 0.00 | 0.15 | 3.00 | 0.15 | 1.05 | 0.50 | |||||
| 0.10 | 0.00 | 0.40 | 4.00 | 1.35 | 2.10 | 1.30 | |||||
| 0.10 | 0.00 | 0.50 | 6.00 | — | — | — | |||||
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 November 20, 2026 expiration, the CERS put/call ratio based on open interest is 0.01 (7 puts vs 819 calls), and 0.09 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 November 20, 2026 is about 95.3%, 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.