MKSI · Option chain

MKSI Option Chain

Every listed MKSI strike within 25% of spot, across the next 6 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

$249.65

Call open interest

4,307

Put open interest

4,856

Put/call (volume)

0.20

149 contracts changed hands across these expirations — 124 calls against 25 puts. Calls outtraded puts 4.96 to one.

Sep 18, 202613 days

call OI 1,578 · put OI 3,126

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	58.10 / 61.80	—	—	190	—	0.00 / 2.40	—	3
—	53.20 / 56.90	—	1	195	—	0.00 / 2.55	—	—
—	48.40 / 52.10	—	1	200	—	0.00 / 2.70	—	59
—	38.80 / 42.60	—	1	210	—	0.05 / 3.00	—	6
—	29.80 / 33.30	—	—	220	—	0.50 / 3.70	—	57
—	21.50 / 25.20	—	1	230	—	3.30 / 4.30	—	730
12.70	15.50 / 17.70	5	1	240	6.59	5.80 / 7.40	1	149
11.25	9.40 / 11.40	6	65	250	11.25	9.90 / 12.20	3	456
6.50	6.30 / 7.40	41	359	260	16.60	16.00 / 18.20	4	302
3.70	2.00 / 5.90	54	147	270	—	22.60 / 26.20	—	626
2.15	1.10 / 2.75	3	30	280	30.90	31.70 / 34.10	1	60
—	0.00 / 3.60	—	500	290	—	40.10 / 43.10	—	154
0.99	0.25 / 2.70	1	79	300	—	49.50 / 52.90	—	341
0.50	0.00 / 2.65	1	393	310	—	59.70 / 62.50	—	183
A dash means the contract did not trade — not a price of zero.

Oct 16, 202641 days

call OI 1,966 · put OI 927

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	60.50 / 64.10	—	1	190	—	0.20 / 3.70	—	9
—	56.10 / 59.60	—	4	195	—	0.80 / 3.90	—	2
—	51.70 / 55.00	—	62	200	—	0.85 / 4.50	—	35
—	43.00 / 46.90	—	548	210	—	2.75 / 6.10	—	31
—	35.70 / 39.00	—	6	220	6.95	5.90 / 8.50	1	307
—	28.70 / 32.30	—	4	230	—	8.80 / 10.60	—	64
—	22.10 / 26.20	—	200	240	16.28	12.70 / 15.30	1	22
—	17.80 / 19.80	—	303	250	19.70	16.80 / 19.10	1	28
—	12.80 / 15.60	—	250	260	—	22.20 / 25.10	—	12
11.40	9.60 / 12.10	1	17	270	31.85	29.30 / 31.90	1	16
—	7.50 / 8.80	—	457	280	—	36.00 / 39.00	—	25
6.30	5.70 / 6.80	3	17	290	—	43.90 / 47.50	—	28
4.70	4.20 / 5.10	2	63	300	—	52.50 / 55.80	—	15
—	1.85 / 4.00	—	34	310	—	61.40 / 64.60	—	333
A dash means the contract did not trade — not a price of zero.

Nov 20, 202676 days

call OI 3 · put OI 2

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	50.00 / 53.40	—	—	210	—	9.60 / 11.50	—	1
—	43.30 / 46.60	—	—	220	—	12.70 / 14.80	—	1
—	18.50 / 21.30	—	1	270	—	36.50 / 40.20	—	—
—	12.60 / 16.10	—	1	290	—	50.50 / 53.80	—	—
—	9.20 / 10.60	—	1	310	—	66.20 / 70.00	—	—
A dash means the contract did not trade — not a price of zero.

Dec 18, 2026104 days

call OI 475 · put OI 667

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	67.70 / 71.30	—	50	190	—	7.20 / 8.80	—	9
—	64.00 / 67.40	—	1	195	10.20	8.30 / 10.10	2	1
—	60.30 / 64.00	—	2	200	—	9.50 / 11.40	—	3
—	53.30 / 56.90	—	1	210	—	12.30 / 14.40	—	1
—	46.80 / 50.00	—	3	220	16.90	15.60 / 17.90	3	2
42.25	40.50 / 44.50	1	1	230	—	19.40 / 21.80	—	10
—	35.20 / 39.00	—	12	240	—	23.90 / 26.30	—	82
32.50	30.80 / 33.80	2	32	250	—	28.90 / 31.40	—	18
28.70	26.70 / 29.00	1	9	260	—	34.50 / 37.00	—	5
—	23.20 / 25.10	—	123	270	—	40.50 / 43.70	—	362
—	19.50 / 21.50	—	154	280	47.00	47.00 / 50.30	1	88
—	16.90 / 18.60	—	38	290	—	53.90 / 57.50	—	15
15.50	14.50 / 15.90	3	41	300	—	61.30 / 64.40	—	60
—	12.20 / 15.40	—	8	310	—	69.70 / 72.50	—	11
A dash means the contract did not trade — not a price of zero.

Jan 15, 2027132 days

call OI 194 · put OI 25

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	70.20 / 73.90	—	2	190	—	7.70 / 11.40	—	—
—	62.90 / 66.50	—	10	200	13.30	11.60 / 13.20	6	4
—	56.30 / 59.90	—	—	210	—	14.50 / 16.40	—	2
—	49.90 / 53.50	—	—	220	—	17.40 / 20.90	—	2
—	38.80 / 42.50	—	2	240	—	26.20 / 29.80	—	—
—	33.90 / 38.00	—	4	250	—	31.30 / 35.00	—	4
—	29.70 / 33.50	—	11	260	—	37.00 / 40.50	—	1
—	25.90 / 30.00	—	107	270	—	43.00 / 47.00	—	2
—	22.90 / 26.50	—	33	280	—	49.60 / 53.20	—	3
—	19.40 / 23.40	—	10	290	—	56.50 / 60.00	—	7
—	17.10 / 20.40	—	5	300	—	63.70 / 67.50	—	—
—	14.20 / 18.50	—	10	310	—	71.60 / 75.00	—	—
A dash means the contract did not trade — not a price of zero.

Feb 19, 2027167 days

call OI 91 · put OI 109

Calls				Strike	Puts
Last	Bid / Ask	Vol	OI		Last	Bid / Ask	Vol	OI
—	73.50 / 77.10	—	—	190	—	10.60 / 14.50	—	1
—	70.00 / 73.70	—	1	195	—	12.00 / 15.90	—	42
—	66.50 / 70.40	—	1	200	—	13.30 / 17.30	—	2
—	54.20 / 58.10	—	1	220	—	20.90 / 24.50	—	—
—	48.60 / 52.40	—	3	230	—	25.40 / 28.90	—	1
—	43.60 / 47.40	—	20	240	—	30.20 / 33.70	—	1
—	39.00 / 42.90	—	30	250	—	35.10 / 38.80	—	1
—	35.00 / 38.60	—	1	260	—	40.80 / 44.70	—	—
—	31.00 / 35.00	—	30	270	—	47.10 / 51.10	—	—
—	27.50 / 31.30	—	—	280	—	54.30 / 56.70	—	4
—	24.50 / 28.30	—	1	290	—	61.10 / 64.10	—	6
—	21.50 / 25.50	—	3	300	—	67.40 / 71.40	—	51
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 MKSI

MKSI options score MKSI gamma walls MKSI max pain MKSI IV rank MKSI put/call ratio MKSI 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.