CSTM · Option chain

CSTM Option Chain

Every listed CSTM strike within 25% of spot, across the next 5 expirations — calls and puts side by side with last price, volume and open interest, plus the closing bid and ask.

Open interest and pricing as of the close on 2026-09-03. Recomputed every morning before the open.

Spot

$26.48

Call open interest

16,628

Put open interest

8,930

Put/call (volume)

0.03

569 contracts changed hands across these expirations — 552 calls against 17 puts. Calls outtraded puts 32.47 to one.

Sep 18, 202613 days

call OI 2,552 · put OI 774

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	5.70 / 7.90	—	2	20	—	0.00 / 0.75	—	3
—	4.10 / 6.70	—	—	21	—	0.00 / 0.75	—	4
—	3.60 / 5.70	—	—	22	—	0.00 / 0.75	—	16
—	2.75 / 4.90	—	—	23	—	0.00 / 0.75	—	12
—	1.80 / 3.80	—	—	24	—	0.00 / 0.75	—	28
—	1.00 / 3.00	—	11	25	—	0.25 / 0.60	—	112
—	0.95 / 1.40	—	6	26	0.60	0.55 / 0.90	2	37
0.73	0.55 / 0.80	10	130	27	—	0.55 / 1.45	—	95
0.25	0.25 / 0.45	212	504	28	—	0.70 / 3.20	—	368
—	0.00 / 0.40	—	817	29	—	2.35 / 3.20	—	52
—	0.00 / 0.30	—	298	30	—	2.60 / 4.10	—	28
0.08	0.00 / 0.20	1	448	31	—	3.30 / 5.30	—	4
—	0.00 / 0.30	—	140	32	—	4.60 / 6.90	—	15
—	0.00 / 0.75	—	196	33	—	4.70 / 7.40	—	—
A dash means the contract did not trade — not a price of zero.

Oct 16, 202641 days

call OI 538 · put OI 205

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	4.40 / 5.80	—	—	22	—	0.00 / 0.75	—	52
—	3.50 / 5.00	—	—	23	0.50	0.25 / 0.60	10	—
—	2.75 / 4.10	—	—	24	—	0.35 / 0.80	—	52
—	2.00 / 3.50	—	—	25	—	0.40 / 1.60	—	72
—	1.70 / 2.25	—	—	26	—	1.25 / 1.45	—	8
1.40	1.30 / 2.45	1	20	27	—	1.55 / 2.35	—	5
0.85	0.90 / 1.05	2	14	28	—	2.20 / 2.85	—	1
—	0.60 / 0.80	—	40	29	—	2.40 / 3.60	—	—
—	0.40 / 0.50	—	367	30	—	2.40 / 4.50	—	—
0.39	0.15 / 0.55	1	78	31	—	3.60 / 5.40	—	—
—	0.05 / 0.35	—	9	32	—	4.70 / 6.20	—	15
—	0.00 / 0.75	—	10	33	—	5.10 / 7.50	—	—
A dash means the contract did not trade — not a price of zero.

Nov 20, 202676 days

call OI 3,413 · put OI 1,127

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	6.60 / 8.30	—	13	20	—	0.10 / 0.85	—	328
—	5.80 / 7.50	—	42	21	—	0.25 / 1.15	—	3
—	5.20 / 6.40	—	13	22	0.85	0.80 / 1.05	1	3
—	4.40 / 5.60	—	1	23	1.03	1.05 / 1.45	1	62
—	3.70 / 5.00	—	—	24	—	1.45 / 1.65	—	38
—	3.00 / 4.40	—	32	25	—	1.30 / 2.10	—	127
—	2.45 / 3.70	—	73	26	—	2.05 / 2.60	—	37
—	2.20 / 2.45	—	156	27	—	2.35 / 2.85	—	96
1.93	1.80 / 2.00	288	444	28	—	3.10 / 3.60	—	31
—	1.40 / 2.00	—	45	29	—	3.70 / 4.20	—	102
—	1.10 / 1.55	—	1,166	30	—	3.80 / 5.00	—	29
1.12	0.65 / 1.20	1	107	31	—	4.60 / 5.80	—	117
0.85	0.50 / 1.15	4	353	32	—	5.30 / 6.50	—	104
0.75	0.55 / 0.95	2	968	33	—	5.90 / 7.40	—	50
A dash means the contract did not trade — not a price of zero.

Jan 15, 2027132 days

call OI 9,999 · put OI 5,679

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	7.10 / 8.70	—	1,207	20	—	0.50 / 1.20	—	2,015
—	6.30 / 7.90	—	11	21	—	0.80 / 1.25	—	3
6.70	5.60 / 6.50	5	1,058	22	—	1.20 / 1.50	—	124
—	4.90 / 6.50	—	26	23	—	1.50 / 1.75	—	161
—	4.30 / 5.70	—	4	24	—	1.80 / 2.10	—	4
—	3.70 / 4.40	—	635	25	2.40	1.95 / 2.55	1	2,060
—	3.30 / 3.80	—	2	26	—	2.40 / 3.00	—	18
3.10	3.00 / 3.30	10	5,519	27	3.50	3.00 / 3.70	1	93
—	2.55 / 3.00	—	33	28	—	3.70 / 4.10	—	5
—	1.80 / 2.65	—	2	29	—	4.10 / 4.70	—	60
1.95	1.85 / 2.10	15	1,239	30	—	5.00 / 5.40	—	1,025
—	1.40 / 2.05	—	13	31	—	5.00 / 6.50	—	101
—	1.15 / 2.00	—	128	32	—	6.30 / 7.10	—	5
—	1.10 / 1.50	—	122	33	—	6.30 / 7.90	—	5
A dash means the contract did not trade — not a price of zero.

Feb 19, 2027167 days

call OI 126 · put OI 1,145

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	7.50 / 9.50	—	7	20	1.20	0.80 / 1.90	1	1
—	6.00 / 8.70	—	—	21	—	0.95 / 2.10	—	47
—	4.10 / 5.50	—	5	25	—	2.30 / 3.20	—	1,001
—	3.80 / 5.00	—	17	26	—	2.50 / 3.70	—	34
—	3.20 / 5.50	—	5	27	—	3.00 / 4.20	—	—
—	2.80 / 4.00	—	21	28	—	3.50 / 4.90	—	44
—	2.50 / 3.60	—	10	29	—	4.10 / 5.30	—	3
—	2.10 / 3.10	—	29	30	—	4.70 / 6.10	—	15
—	1.80 / 3.40	—	20	31	—	5.20 / 6.70	—	—
—	1.45 / 3.90	—	1	32	—	6.00 / 7.60	—	—
—	0.60 / 2.45	—	11	33	—	6.60 / 8.50	—	—
A dash means the contract did not trade — not a price of zero.

How to read this chain

Calls sit on the left, puts on the right, and every row is one strike. The highlighted row is the strike closest to spot. Open interest is the number of contracts still outstanding at that strike — positions that exist right now. Volume is how many traded on the session shown. Open interest builds slowly and marks where positioning has accumulated; volume spikes and marks where attention went today.

Strikes with no open interest and no trades on either side are omitted, and the ladder is trimmed to within 25% of spot — the far wings are almost entirely empty and say nothing about positioning.

More on CSTM

CSTM options score CSTM gamma walls CSTM max pain CSTM IV rank CSTM put/call ratio CSTM options flow

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Educational, not investment advice. Options involve risk. Open interest is reported with a one-session lag by OCC, so these levels describe positioning as of the last settled session, not live intraday flow.