Options Skew Analytics

DIA option chain

Strikes around the forward, as they were quoted at the close

Data as of 22 September 2026 (end of day)

2026-09-25(3 days)ATM 12.25%±5.76skew +1.10
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
114$10.10$10.40—$509.0014.48%$0.17$0.2416072
18725$9.15$9.50—$510.0014.13%$0.23$0.29764422
432$8.25$8.55—$511.0013.79%$0.30$0.3688110
2227$7.35$7.65—$512.0013.66%$0.40$0.48272164
1224$6.50$6.75—$513.0013.53%$0.54$0.62262156
3448$5.65$5.90—$514.0013.43%$0.73$0.79351352
243288$4.90$5.10—$515.0013.31%$0.94$1.02627574
1833,154$4.15$4.40—$516.0012.98%$1.17$1.26192433
556262$3.45$3.60—$517.0012.74%$1.46$1.57308724
1,421613$2.82$2.95—$518.0012.46%$1.81$1.92132568
1,311280$2.25$2.36—$519.0012.26%$2.24$2.35205523
2,4822,025$1.77$1.8612.12%$520.00—$2.76$2.88381625
7661,297$1.36$1.4612.06%$521.00—$3.30$3.5015087
1,1093,266$1.04$1.1312.08%$522.00—$4.00$4.2010462
909683$0.80$0.8712.21%$523.00—$4.75$5.0010481
377238$0.58$0.6612.22%$524.00—$5.55$5.8011745
9041,836$0.43$0.4912.31%$525.00—$6.35$6.7010728
167277$0.31$0.3712.44%$526.00—$7.25$7.606014
2793,465$0.22$0.2712.52%$527.00—$8.20$8.502089
298160$0.15$0.1912.54%$528.00—$9.10$9.451273
1183,582$0.08$0.1312.32%$529.00—$10.05$10.452390

Forward $519.01. The 25-delta put carries +1.10 volatility points over the 25-delta call.

2026-09-30(8 days)ATM 11.30%±8.68skew +1.26
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
01$10.85$11.15—$509.0012.91%$0.71$0.81282305
87334$9.95$10.25—$510.0012.71%$0.84$0.9317922
030$9.15$9.45—$511.0012.60%$1.00$1.1059194
029$8.30$8.60—$512.0012.43%$1.19$1.2685137
06$7.55$7.80—$513.0012.36%$1.40$1.508520
123$6.80$7.00—$514.0012.20%$1.64$1.7326136
51217$6.05$6.25—$515.0012.02%$1.89$2.0025373
65808$5.35$5.55—$516.0011.80%$2.18$2.28244141
17351$4.70$4.85—$517.0011.62%$2.51$2.61240439
331373$4.05$4.20—$518.0011.44%$2.87$3.00128206
114204$3.50$3.65—$519.0011.34%$3.30$3.4519225
220376$2.98$3.1011.17%$520.00—$3.75$3.9019034
7915$2.51$2.6311.06%$521.00—$4.30$4.45476
6395$2.12$2.2211.02%$522.00—$4.90$5.102924
88327$1.78$1.8711.03%$523.00—$5.50$5.75182
2554$1.48$1.5811.06%$524.00—$6.25$6.505561
299650$1.23$1.3211.10%$525.00—$7.00$7.255751
1666$1.01$1.1111.16%$526.00—$7.80$8.051320
1138$0.83$0.9211.22%$527.00—$8.60$8.902201
21105$0.68$0.7611.29%$528.00—$9.45$9.75333
756$0.54$0.6311.33%$529.00—$10.30$10.70290

Forward $519.20. The 25-delta put carries +1.26 volatility points over the 25-delta call.

2026-10-02(10 days)ATM 11.98%±10.30skew +1.38
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
1561$10.70$11.00—$510.0013.44%$1.26$1.3743111
750$9.85$10.15—$511.0013.32%$1.45$1.56203
31$9.05$9.35—$512.0013.16%$1.66$1.75100513
13$8.30$8.60—$513.0013.01%$1.89$1.984717
144$7.55$7.85—$514.0012.87%$2.14$2.244076
7488$6.85$7.05—$515.0012.71%$2.41$2.53115112
14693$6.15$6.35—$516.0012.52%$2.71$2.83218103
1328$5.50$5.65—$517.0012.32%$3.00$3.20191134
98107$4.85$5.00—$518.0012.16%$3.40$3.5582238
94867$4.25$4.45—$519.0012.03%$3.80$4.0057104
92188$3.75$3.9011.94%$520.00—$4.30$4.45185219
8586$3.25$3.4011.81%$521.00—$4.80$5.00162
174135$2.82$2.9511.74%$522.00—$5.35$5.60253
1,4572,087$2.45$2.5811.76%$523.00—$6.00$6.20582
10143$2.11$2.2111.71%$524.00—$6.65$6.903216
833786$1.81$1.9111.73%$525.00—$7.35$7.6547315
48121$1.55$1.6511.78%$526.00—$8.10$8.40150
563$1.32$1.4311.84%$527.00—$8.90$9.20240
841$1.22$1.3211.86%$527.50—$9.30$9.60690
784$1.12$1.2311.89%$528.00—$9.70$10.05161
2526$0.95$1.0611.97%$529.00—$10.55$10.8540

Forward $519.45. The 25-delta put carries +1.38 volatility points over the 25-delta call.

2026-10-09(17 days)ATM 12.19%±13.67skew +1.47
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
100$11.35$11.65—$511.0013.40%$2.45$2.59124
223$10.60$10.85—$512.0013.24%$2.69$2.812820
78$9.85$10.10—$513.0013.13%$2.94$3.10562
0136$9.10$9.35—$514.0012.93%$3.20$3.35610
176$8.40$8.65—$515.0012.85%$3.50$3.706254
4020$7.70$7.95—$516.0012.66%$3.80$4.00158355
1170$7.05$7.30—$517.0012.52%$4.15$4.35286
11153$6.45$6.65—$518.0012.38%$4.50$4.7588376
296$5.85$6.05—$519.0012.29%$4.95$5.151822
3868$5.30$5.5012.20%$520.00—$5.40$5.606717
888$4.75$4.9512.03%$521.00—$5.90$6.1038236
352148$4.30$4.5012.02%$522.00—$6.40$6.65170
4126$4.05$4.2511.94%$522.50—$6.70$6.9041
15498$3.85$4.0511.95%$523.00—$6.95$7.20241
502149$3.45$3.6511.93%$524.00—$7.60$7.8590
286103$3.05$3.2511.83%$525.00—$8.25$8.507951
1954$2.76$2.9111.87%$526.00—$8.90$9.2030
018$2.46$2.6111.89%$527.00—$9.60$9.90120
022$2.32$2.4611.89%$527.50—$9.95$10.3020
317$2.18$2.3311.89%$528.00—$10.35$10.7030
1661$1.94$2.0811.92%$529.00—$11.15$11.45150

Forward $519.90. The 25-delta put carries +1.47 volatility points over the 25-delta call.

2026-10-16(24 days)ATM 12.66%±16.88skew +1.63
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
39117$13.40$13.75—$510.0013.97%$3.25$3.452,584633
30$12.65$12.95—$511.0013.75%$3.45$3.65313
15$11.90$12.20—$512.0013.70%$3.75$3.9533
07$11.20$11.50—$513.0013.51%$4.00$4.20011
41$10.50$10.75—$514.0013.39%$4.30$4.5072
1321,196$9.80$10.05—$515.0013.24%$4.60$4.80570958
576$9.15$9.40—$516.0013.14%$4.95$5.15431
250$8.50$8.75—$517.0013.05%$5.30$5.553026
6626$7.85$8.10—$518.0012.87%$5.65$5.902782
911$7.30$7.55—$519.0012.84%$6.10$6.353712
281606$6.70$6.95—$520.0012.67%$6.50$6.751,81934
29259$6.20$6.4512.64%$521.00—$7.00$7.25649356
47159$5.70$5.9512.57%$522.00—$7.50$7.75129208
5241$5.20$5.4512.45%$523.00—$8.05$8.305538
39288$4.75$5.0012.38%$524.00—$8.60$8.907551
4792,378$4.35$4.5512.32%$525.00—$9.20$9.5025611
9246$4.00$4.2012.35%$526.00—$9.85$10.101513
953$3.65$3.8512.34%$527.00—$10.50$10.801363
139270$3.30$3.5512.34%$528.00—$11.15$11.5010513
24553$3.00$3.2012.29%$529.00—$11.85$12.20810
146400$2.75$2.9412.35%$530.00—$12.60$12.958409

Forward $520.20. The 25-delta put carries +1.63 volatility points over the 25-delta call.

2026-10-23(31 days)ATM 12.95%±19.64skew +1.26
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
441$13.20$13.50—$512.0013.84%$4.60$4.80304
05$12.50$12.80—$513.0013.70%$4.85$5.10222
405$11.80$12.05—$514.0013.57%$5.15$5.40322
3220$11.10$11.40—$515.0013.46%$5.50$5.70335
12$10.45$10.70—$516.0013.36%$5.85$6.05232
40280$9.80$10.00—$517.0013.27%$6.20$6.45176
37$9.50$9.75—$517.5013.24%$6.40$6.6572
2992$9.20$9.45—$518.0013.20%$6.60$6.851814
10124$8.60$8.85—$519.0013.09%$7.00$7.25130
29113$8.00$8.30—$520.0012.99%$7.40$7.70220
17$7.45$7.7512.94%$521.00—$7.90$8.1530
89$6.95$7.2012.86%$522.00—$8.40$8.6530
64$6.70$6.9512.82%$522.50—$8.65$8.90110
83$6.45$6.7012.78%$523.00—$8.90$9.2080
58$6.00$6.2512.74%$524.00—$9.45$9.7540
353$5.55$5.8012.68%$525.00—$10.00$10.30320
17$5.15$5.4012.66%$526.00—$10.60$10.90230
4157$4.75$5.0012.61%$527.00—$11.20$11.5510
65$4.55$4.8012.57%$527.50—$11.55$11.9010
333$4.40$4.6512.62%$528.00—$11.85$12.20110
14$4.05$4.3012.58%$529.00—$12.55$12.9010

Forward $520.57. The 25-delta put carries +1.26 volatility points over the 25-delta call.

2026-10-30(38 days)ATM 13.48%±22.66
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
—————$512.5014.24%$5.65$5.9512
3145$13.85$14.15—$513.0014.19%$5.80$6.1080
1067$13.15$13.45—$514.0014.10%$6.15$6.40870
816$12.50$12.80—$515.0013.98%$6.45$6.75212
010$11.85$12.15—$516.0013.88%$6.80$7.1040
410$11.20$11.50—$517.0013.80%$7.20$7.4537
26$10.90$11.20—$517.5013.77%$7.40$7.65192
2522$10.60$10.90—$518.0013.69%$7.55$7.85474
610$10.00$10.30—$519.0013.63%$8.00$8.251915
1243$9.45$9.70—$520.0013.55%$8.40$8.708721
15$8.90$9.15—$521.00—$8.90$9.15510
215$8.35$8.6513.45%$522.00—$9.35$9.6570
372$8.10$8.3513.39%$522.50—$9.60$9.9023
22$7.85$8.1013.35%$523.00—$9.85$10.15610
133$7.35$7.6513.31%$524.00—$10.40$10.70152
3254$6.90$7.1513.24%$525.00—$10.95$11.252715
310$6.45$6.7513.22%$526.00—$11.50$11.8024
734$6.05$6.3013.17%$527.00—$12.10$12.4024
216$5.85$6.1013.15%$527.50—$12.40$12.7502
65$5.65$5.9013.13%$528.00—$12.70$13.0522
5108$5.25$5.5513.10%$529.00—————

Forward $521.00. Not enough surviving quotes on both wings to measure the skew here.

2026-11-20(59 days)ATM 14.01%±29.40skew +1.51
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
14473$19.15$19.50—$510.0014.92%$7.10$7.351497
3377$15.75$16.05—$515.0014.52%$8.70$9.00423311
95168$12.65$12.95—$520.0014.16%$10.65$10.95270191
1343$12.05$12.40—$521.0014.08%$11.05$11.401065
264$11.50$11.8514.05%$522.00—$11.55$11.85231
450$11.00$11.3014.00%$523.00—$12.00$12.35500
524$10.45$10.8013.92%$524.00—$12.50$12.851500
5136$9.95$10.3013.87%$525.00—$13.00$13.3528714
10918$9.45$9.8013.79%$526.00—$13.55$13.85312
018$9.00$9.3013.73%$527.00—$14.10$14.40374
134$8.55$8.8513.68%$528.00—$14.65$15.00200
025$8.10$8.4513.65%$529.00—$15.25$15.60312
49416$7.70$8.0513.63%$530.00—$15.85$16.20670
012$7.30$7.6013.56%$531.00—$16.45$16.801420
014$6.95$7.2513.57%$532.00—$17.10$17.45310
015$6.55$6.8513.50%$533.00—$17.75$18.10130
211527$6.25$6.5013.51%$534.00—$18.40$18.80300
34437$5.90$6.1513.47%$535.00—$19.10$19.50981
011$5.55$5.8513.44%$536.00—$19.80$20.2040
023$5.25$5.5513.44%$537.00—$20.50$20.9510
014$4.95$5.2513.41%$538.00—$21.25$21.701200

Forward $521.97. The 25-delta put carries +1.51 volatility points over the 25-delta call.

How to read this

Calls on the left, puts on the right, the strike between them — the layout every chain uses. Each block is one expiration, and the heading carries its days to expiry, the at-the-money implied volatility, and the one-standard-deviation move that volatility implies over that time.

Only the 21 strikes nearest the forward are stored, which is the part of the board that carries the volume. The shaded side is in the money: below the forward for calls, above it for puts.

Implied volatility is shown on the out-of-the-money side only. An in-the-money option is nearly all intrinsic value quoted on a wide market, so a volatility solved from it would look authoritative and mean very little. The price is still shown, because the price is real; the blank is deliberate.