Century Aluminum (CENX) Options Chain
NASDAQ: CENXIndustrialsAluminumUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Expiration date
- Expiration
- Nov 20, 2026
- Days to expiration
- 40
- Share price
- $36.76
- Put/call ratio (OI)
- 0.42
- Put/call ratio (volume)
- 0.66
- Expected move
- ±$7.93
- Open interest (C / P)
- 7.63K / 3.24K
CENX options summary
The CENX options chain for the November 20, 2026 expiration lists 16 call and 10 put contracts, with 40 days until expiration. Open interest stands at 7,635 calls and 3,240 puts, a put/call ratio of 0.42, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $35.00 strike is 65.2%, which implies the market expects a move of about ±$7.93 (21.6%) in Century Aluminum stock by expiration.
The most open interest sits at the $80.00 call (2.35K contracts) and the $40.00 put (1.31K contracts).
Summary generated from market data by MetaCap's automated system. Methodology
CENX options chain · November 20, 2026
| Calls | Puts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Last | Bid | Ask | Strike | Bid | Ask | Last | |||||
| 11.48 | 10.70 | 12.70 | 25.00 | 0.00 | 0.45 | 0.16 | |||||
| 7.30 | 7.00 | 7.80 | 30.00 | 0.55 | 0.75 | 0.73 | |||||
| 3.80 | 3.80 | 4.80 | 35.00 | 1.95 | 2.25 | 2.20 | |||||
| 1.85 | 1.75 | 2.50 | 40.00 | 4.40 | 5.90 | 5.30 | |||||
| 0.78 | 0.60 | 1.05 | 45.00 | 8.40 | 9.40 | 9.81 | |||||
| 0.35 | 0.15 | 0.60 | 50.00 | 12.50 | 14.80 | 13.00 | |||||
| 0.24 | 0.05 | 0.50 | 55.00 | 17.10 | 19.70 | 18.58 | |||||
| 0.07 | 0.00 | 0.75 | 60.00 | 22.00 | 25.00 | 13.20 | |||||
| 0.10 | 0.00 | 0.15 | 65.00 | — | — | — | |||||
| 0.20 | 0.00 | 0.70 | 70.00 | 20.70 | 23.30 | 18.60 | |||||
| 0.40 | 0.00 | 0.65 | 75.00 | — | — | — | |||||
| 0.16 | 0.00 | 0.65 | 80.00 | 0.00 | 0.00 | 22.30 | |||||
| 0.32 | 0.00 | 0.60 | 85.00 | — | — | — | |||||
| 0.09 | 0.00 | 0.60 | 90.00 | — | — | — | |||||
| 0.20 | 0.00 | 0.60 | 95.00 | — | — | — | |||||
| 0.15 | 0.00 | 0.60 | 100.00 | — | — | — | |||||
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 CENX put/call ratio?
For the November 20, 2026 expiration, the CENX put/call ratio based on open interest is 0.42 (3,240 puts vs 7,635 calls), and 0.66 based on today's volume. A ratio above 1 means more puts than calls.
What is CENX's implied volatility?
At-the-money implied volatility for CENX options expiring November 20, 2026 is about 65.2%, an annualized estimate of how much the market expects Century Aluminum stock to move.
How many CENX option expiration dates are there?
CENX has 7 listed expiration dates, from Oct 16, 2026 to Jan 19, 2029.
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.