Constellium (CSTM) Options Chain

NYSE: CSTMIndustrialsMetal FabricationsUSD

25.81+0.21 (+0.82%)

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

Expiration date

Expiration: Nov 20, 2026
Days to expiration: 40
Share price: $25.81
Put/call ratio (OI): 0.27
Put/call ratio (volume): 0.19
ATM implied volatility: 54.2%
Expected move: ±$4.63
Open interest (C / P): 6.13K / 1.63K

CSTM options summary

The CSTM options chain for the November 20, 2026 expiration lists 27 call and 23 put contracts, with 40 days until expiration. Open interest stands at 6,130 calls and 1,634 puts, a put/call ratio of 0.27, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $26.00 strike is 54.2%, which implies the market expects a move of about ±$4.63 (17.9%) in Constellium stock by expiration.

The most open interest sits at the $30.00 call (987 contracts) and the $25.00 put (511 contracts).

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

CSTM options chain · November 20, 2026

CSTM 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
0	10	—	20.20	0.00	0.00	15.00	0.00	0.75	0.30	125.2%	2	2
0	—	—	12.60	0.00	0.00	16.00	0.00	0.75	0.38	113.1%	28	6
—	—	—	—	—	—	17.00	0.00	0.95	0.30	108.9%	4	7
0	1	485.6%	15.55	15.50	18.40	18.00	0.00	0.75	0.30	90.6%	2	8
—	—	—	—	—	—	19.00	0.00	0.90	0.20	85.0%	4	18
13	7	89.3%	7.40	5.70	7.40	20.00	0.00	0.40	0.22	58.4%	5	333
36	30	75.7%	5.03	4.90	6.10	21.00	0.05	0.80	0.41	62.9%	2	10
11	2	58.2%	3.49	3.10	5.60	22.00	0.05	1.60	0.45	70.1%	6	3
1	2	396.9%	10.86	12.50	14.50	23.00	0.60	0.75	0.65	53.1%	5	78
21	2	55.9%	2.62	2.10	3.70	24.00	0.70	2.45	0.93	71.4%	10	54
86	13	58.1%	1.60	1.95	2.85	25.00	1.15	1.45	1.45	53.9%	5	511
CSTM $25.81
125	3	53.3%	1.65	1.50	1.75	26.00	1.60	2.00	2.15	55.0%	1	37
269	5	50.5%	1.20	1.15	1.35	27.00	2.15	2.60	2.37	55.3%	7	97
459	10	59.0%	0.90	0.45	1.20	28.00	2.60	3.30	2.80	56.3%	1	45
102	20	53.1%	0.65	0.45	0.75	29.00	2.55	5.00	5.70	86.4%	1	102
987	13	51.2%	0.30	0.20	0.50	30.00	3.70	4.90	4.90	59.1%	1	30
161	1	51.0%	0.35	0.25	0.45	31.00	3.70	6.20	5.30	76.7%	117	117
348	1	54.1%	0.30	0.10	0.30	32.00	5.40	6.90	6.41	72.2%	15	119
964	19	63.2%	0.15	0.00	0.75	33.00	6.20	8.50	7.35	50.4%	1	50
791	5	68.3%	0.35	0.00	0.75	34.00	6.50	8.90	6.70	83.7%	5	7
883	13	60.4%	0.10	0.00	0.35	35.00	—	—	—	—	—	—
14	1	77.6%	0.67	0.00	0.75	36.00	—	—	—	—	—	—
20	3	68.4%	0.38	0.00	0.35	37.00	—	—	—	—	—	—
0	5	25.0%	0.35	0.00	0.00	38.00	—	—	—	—	—	—
78	2	90.1%	0.05	0.00	0.75	39.00	—	—	—	—	—	—
49	3	94.0%	0.20	0.00	0.75	40.00	0.00	0.00	7.60	—	—	0
65	3	111.2%	0.60	0.00	0.75	45.00	0.00	0.00	11.50	—	1	0
195	500	126.0%	0.05	0.00	0.75	50.00	—	—	—	—	—	—
452	500	138.8%	0.05	0.00	0.75	55.00	26.60	29.70	26.18	148.3%	—	0

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 CSTM put/call ratio?

For the November 20, 2026 expiration, the CSTM put/call ratio based on open interest is 0.27 (1,634 puts vs 6,130 calls), and 0.19 based on today's volume. A ratio above 1 means more puts than calls.

What is CSTM's implied volatility?

At-the-money implied volatility for CSTM options expiring November 20, 2026 is about 54.2%, an annualized estimate of how much the market expects Constellium stock to move.

How many CSTM option expiration dates are there?

CSTM 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.