Century Aluminum (CENX) Options Chain

NASDAQ: CENXIndustrialsAluminumUSD

36.76+0.38 (+1.04%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Jan 19, 2029
Days to expiration: 831
Share price: $36.76
Put/call ratio (OI): 0.92
Put/call ratio (volume): 0.44
ATM implied volatility: 63.6%
Expected move: ±$35.28
Open interest (C / P): 84 / 77

CENX options summary

The CENX options chain for the January 19, 2029 expiration lists 7 call and 8 put contracts, with 831 days until expiration. Open interest stands at 84 calls and 77 puts, a put/call ratio of 0.92, which is fairly balanced between calls and puts. At-the-money implied volatility near the $35.00 strike is 63.6%, which implies the market expects a move of about ±$35.28 (96.0%) in Century Aluminum stock by expiration.

The most open interest sits at the $50.00 call (25 contracts) and the $35.00 put (50 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

CENX options chain · January 19, 2029

CENX calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
—	—	—	—	—	—	20.00	1.55	5.20	3.90	59.2%	1	4
—	—	—	—	—	—	22.50	2.00	7.00	4.73	59.5%	2	3
—	—	—	—	—	—	25.00	3.90	8.00	5.20	61.0%	—	1
1	—	75.0%	17.60	15.80	20.00	30.00	6.00	9.90	7.73	56.6%	—	1
6	4	72.4%	17.74	13.50	18.10	35.00	8.80	12.50	10.94	54.8%	—	50
CENX $36.76
1	1	70.8%	14.70	11.80	16.30	40.00	11.90	15.30	14.00	53.0%	1	3
5	—	70.9%	14.50	11.60	14.00	45.00	15.10	19.50	16.12	53.4%	—	5
25	1	71.8%	11.50	10.40	13.40	50.00	18.50	23.00	20.20	51.8%	—	10
24	1	68.9%	8.50	7.00	10.40	65.00	—	—	—	—	—	—
22	2	66.8%	7.40	5.50	9.60	70.00	—	—	—	—	—	—

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 January 19, 2029 expiration, the CENX put/call ratio based on open interest is 0.92 (77 puts vs 84 calls), and 0.44 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 January 19, 2029 is about 63.6%, 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.