Options Skew Analytics

WDC option chain

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

Data as of 23 September 2026 (end of day)

2026-09-25(2 days)ATM 78.15%±27.35skew -2.48
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
247$27.20$29.30—$447.5075.72%$1.82$2.634569
72529$25.55$27.05—$450.0078.26%$2.74$3.103401,349
2885$23.25$25.80—$452.5077.84%$3.10$3.7518194
153180$21.40$23.85—$455.0077.69%$3.70$4.35189178
33121$19.55$22.10—$457.5077.75%$4.35$5.103174
149406$17.80$19.20—$460.0077.95%$5.10$5.95147827
6986$16.30$18.50—$462.5077.66%$5.95$6.7537151
142314$14.80$16.25—$465.0077.87%$6.90$7.7575270
3661$13.00$14.55—$467.5076.66%$7.45$8.95591
289808$11.90$12.90—$470.0078.27%$8.95$10.1515574
6567$10.35$11.65—$472.5077.76%$10.00$11.404728
312305$9.30$10.6078.73%$475.00—$11.25$12.755549
118117$8.20$9.4078.35%$477.50—$12.55$14.2055
323575$7.25$8.3578.41%$480.00—$14.00$15.8013417
11563$6.50$7.4078.96%$482.50—$13.70$17.05133
150353$6.05$6.7081.03%$485.00—$15.15$19.052142
5267$5.10$5.8580.02%$487.50—$16.90$20.60170
184508$4.50$5.3081.02%$490.00—$18.75$22.401412
5054$3.85$4.5080.18%$492.50—$20.60$24.2510
63174$3.35$4.0080.73%$495.00—$22.45$26.35261
4227$3.00$3.5081.50%$497.50—$26.95$29.0520

Forward $472.80. The 25-delta put carries -2.48 volatility points over the 25-delta call.

2026-10-02(9 days)ATM 72.38%±53.81
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
06$33.75$39.20—$447.5072.15%$9.80$10.9097
30138$33.90$36.20—$450.0071.97%$10.50$11.80192142
419$31.95$35.00—$452.5072.19%$11.45$12.75344
1093$30.45$33.35—$455.0072.05%$12.45$13.5518796
514$28.95$31.85—$457.5072.20%$13.35$14.701910
75247$27.80$29.10—$460.0071.74%$14.35$15.5015519
619$26.25$28.95—$462.5072.35%$15.45$16.9083
26654$25.00$26.45—$465.0072.44%$16.65$18.005316
1518$23.65$25.25—$467.5071.08%$17.00$19.20423
40105$22.40$23.85—$470.0072.72%$19.05$20.558522
3131$21.15$22.70—$472.5072.58%$20.10$21.951600
1273$20.00$21.5072.62%$475.00—$21.65$23.1011020
024$18.55$20.4572.25%$477.50—$22.75$24.65111
313406$17.85$19.2572.73%$480.00—$24.15$26.20472
1023$16.75$18.2072.65%$482.50—————
19111$15.85$17.2072.84%$485.00—$27.25$29.201811
1212$14.95$16.0572.62%$487.50—$28.60$30.70220
10139$14.05$15.3573.04%$490.00—$30.20$32.251895
12$13.05$14.5072.88%$492.50—$30.95$33.85127
358$12.50$14.3074.53%$495.00—$33.45$35.65385
39$11.75$12.8073.37%$497.50—$34.35$37.35010

Forward $473.40. Not enough surviving quotes on both wings to measure the skew here.

2026-10-09(16 days)ATM 70.61%±70.12skew -2.32
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
011$44.15$53.15—$435.0069.39%$10.70$11.651066
01$42.85$51.40—$437.5069.73%$11.10$13.0064
622$42.65$49.65—$440.0069.41%$11.90$13.6013822
07$43.05$49.15—$442.5069.08%$12.70$14.2522
2425$42.20$44.35—$445.0069.38%$13.75$15.15807
—————$447.5069.64%$14.65$16.2523
2260$39.35$41.20—$450.0070.00%$15.70$17.352076
42$37.65$41.55—$452.5069.90%$16.65$18.30044
19$36.25$38.30—$455.0070.18%$17.65$19.55106129
203$35.35$37.15—$457.5069.96%$18.75$20.40134
283$34.00$35.75—$460.0070.10%$19.90$21.558210
1455$31.35$33.50—$465.0070.68%$22.25$24.2572
2850$28.85$31.00—$470.0070.31%$24.55$26.55191
7345$26.50$28.1569.95%$475.00—$27.00$29.00230
11147$24.30$26.4070.67%$480.00—$29.70$32.805611
158$22.40$24.5071.23%$485.00—$32.95$35.052713
595$20.25$21.9070.24%$490.00—$35.55$38.201170
339$18.75$20.4571.22%$495.00—$39.15$41.701713
56238$17.15$18.5071.10%$500.00—$42.65$45.155212
23$15.50$17.0071.19%$505.00—$46.20$48.60202
2298$14.35$15.5571.71%$510.00—$49.45$52.40130

Forward $474.32. The 25-delta put carries -2.32 volatility points over the 25-delta call.

2026-10-16(23 days)ATM 69.94%±83.25
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
011$50.35$58.00—$435.0069.20%$15.10$16.15420
03$50.85$56.60—$437.5069.23%$15.95$17.0576
406516$50.80$52.35—$440.0069.23%$16.90$17.90980220
57$49.10$51.75—$442.5069.23%$17.80$18.852360
720$47.60$49.25—$445.0069.27%$18.65$19.951256
20$46.05$47.65—$447.5069.29%$19.65$20.9531
5607$44.65$46.10—$450.0069.30%$20.80$21.85531236
25$43.20$44.75—$452.5069.13%$21.70$22.904920
29$42.05$43.50—$455.0069.29%$22.75$24.15205
110$40.40$41.95—$457.5069.26%$23.90$25.2010
50482$39.35$41.90—$460.0069.38%$25.10$26.4092721
1235$36.75$38.10—$465.0069.42%$27.50$28.801036
30554$34.30$35.70—$470.0070.42%$30.60$31.65548303
2224$32.00$33.3569.88%$475.00—$32.60$34.4006
43803$29.80$31.1069.91%$480.00—$35.50$36.853372
472$27.75$29.0570.07%$485.00—$38.25$40.1520
83292$25.95$27.0070.25%$490.00—$41.25$43.101770
35$24.00$25.2070.30%$495.00—————
5081,068$22.60$23.6570.99%$500.00—$47.95$49.553243
254$20.50$21.7570.31%$505.00—————
9282$19.20$20.3070.78%$510.00—$53.40$56.501170

Forward $474.17. Not enough surviving quotes on both wings to measure the skew here.

2026-10-23(30 days)ATM 70.93%±96.28skew -5.16
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
014$61.75$69.25—$425.0067.68%$14.75$16.556143
156$58.50$66.05—$430.0068.04%$16.45$18.507527
918$55.35$62.80—$435.0068.03%$18.40$20.1022103
613$52.30$59.85—$440.0068.68%$19.70$23.2010610
1016$49.35$56.65—$445.0067.85%$20.75$25.35475
196$46.50$53.60—$450.0067.93%$23.65$26.75646
514$43.75$49.30—$455.0068.47%$26.70$28.702645
66170$44.05$46.30—$460.0067.77%$27.80$31.554211
044$38.50$45.95—$465.0067.03%$28.35$35.10173
489$36.10$43.70—$470.0070.20%$33.15$38.80231
5470$33.75$41.6571.23%$475.00—$35.50$42.90223
442$31.50$39.9071.62%$480.00—$37.65$45.851113
344$29.30$36.8570.66%$485.00—$40.45$50.3526
1854$27.60$34.4070.54%$490.00—$43.50$53.05125
17$25.90$32.9071.12%$495.00—$47.05$56.75160
7100$24.55$31.8072.24%$500.00—$50.00$60.00140
553$22.85$29.0071.26%$505.00—$53.30$63.3024
405$21.80$27.5572.01%$510.00—$56.45$66.4570
091$19.45$26.8072.03%$515.00—$60.15$70.1550
316$17.85$24.6071.21%$520.00—$63.15$73.1050
242$19.20$22.1072.84%$525.00—$67.40$76.7020

Forward $473.50. The 25-delta put carries -5.16 volatility points over the 25-delta call.

2026-10-30(37 days)ATM 75.61%±114.03
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
49$64.90$74.90—$425.0073.70%$19.00$24.85293
417$62.60$72.60—$430.0073.76%$21.00$26.651764
06$58.95$68.95—$435.0072.24%$21.45$28.501715
117$56.55$66.55—$440.0071.72%$22.95$30.502844
415$53.70$63.70—$445.0072.70%$25.50$33.30512
1016$51.10$60.95—$450.0076.97%$29.05$39.05341
04$47.80$57.75—$455.0076.86%$31.35$41.35172
532$50.15$53.55—$460.0073.59%$31.90$41.904016
3512$42.70$52.65—$465.0075.34%$35.45$45.4530
2570$45.90$50.75—$470.0075.22%$38.00$48.00411
229$39.10$49.1074.79%$475.00—$43.00$47.90169
1412$37.00$46.3074.35%$480.00—$44.40$50.5040
310$34.90$44.9074.94%$485.00—$47.35$57.3526
3122$35.75$41.3576.05%$490.00—$50.45$60.4520
79$29.65$39.6072.73%$495.00—$53.35$63.3543
662$32.50$37.5076.46%$500.00—$56.60$66.60253
016$26.10$34.9071.87%$505.00—$59.70$69.7006
1171$26.80$36.5076.69%$510.00—$63.30$73.3010
439$25.50$33.9076.15%$515.00—————
8209$25.10$30.0075.13%$520.00—$70.05$80.05210
1514$23.35$29.2575.54%$525.00—————

Forward $473.64. Not enough surviving quotes on both wings to measure the skew here.

2026-11-20(58 days)ATM 75.50%±143.32skew -2.34
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
0321$105.85$115.75—$380.0074.90%$15.80$16.75888411
019$99.50$108.50—$390.0074.90%$18.55$19.7097321
090$93.55$102.15—$400.0074.56%$21.20$22.9588034
080$87.60$94.90—$410.0074.82%$25.00$26.352603
102935$82.35$88.50—$420.0074.47%$28.15$30.251,40436
4121$78.40$80.20—$430.0074.67%$32.30$34.4568810
8199$73.40$74.90—$440.0074.84%$36.70$39.00201153
26733$67.95$69.60—$450.0074.41%$41.60$42.8029517
25194$63.05$64.50—$460.0074.86%$46.50$48.4522410
22322$58.40$60.20—$470.0075.31%$51.90$54.202942
16127$54.10$55.8075.48%$480.00—$57.55$59.851602
5190$49.90$51.5575.36%$490.00—$63.50$65.051682
57709$46.20$47.7575.53%$500.00—$69.85$71.7511315
191,081$42.70$44.2075.66%$510.00—$76.20$78.602630
24179$39.55$41.0575.98%$520.00—$81.95$85.452860
11177$36.40$38.0076.06%$530.00—$89.05$92.60890
3514$33.50$35.2576.23%$540.00—$96.80$99.151979
15571$31.05$32.4576.38%$550.00—$104.30$107.401160
3229$28.75$30.1576.74%$560.00—$110.60$115.35970
10223$26.55$28.0077.02%$570.00—$119.65$121.952310
9315$24.25$26.1077.17%$580.00—$127.80$130.901640

Forward $476.23. The 25-delta put carries -2.34 volatility points over the 25-delta call.

2026-12-18(86 days)ATM 73.61%±170.15
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
0123$113.80$124.95—$380.0072.67%$22.40$24.1534023
143$107.10$117.35—$390.0072.61%$25.70$27.405155
3404$105.25$110.70—$400.0072.57%$29.20$31.0081119
1149$95.20$104.20—$410.0073.59%$32.80$36.652010
15917$91.80$97.45—$420.0073.60%$36.55$41.201702
7221$83.00$92.00—$430.0072.87%$41.00$44.351561
38176$83.05$86.00—$440.0072.53%$45.95$48.1020679
36946$78.60$82.40—$450.0073.24%$50.55$54.5016619
37358$72.30$78.15—$460.0073.04%$55.50$59.5023316
17249$64.90$72.90—$470.0073.03%$60.55$65.2013414
8144$60.95$68.6573.07%$480.00—$66.00$71.051354
6340$57.05$64.8073.27%$490.00—$72.25$77.951292
16487$57.30$60.5575.28%$500.00—$79.25$81.0531816
1155$49.80$57.2573.33%$510.00—$83.55$91.101180
1143$47.05$53.8073.68%$520.00—$91.10$98.401030
4499$46.10$50.7075.01%$530.00—$97.35$105.753960
692$44.30$46.5075.07%$540.00—$104.65$113.101040
4334$39.35$44.7074.51%$550.00—$112.20$120.351080
3296$38.05$42.1075.36%$560.00—$119.55$127.10590
3182$35.65$39.5575.45%$570.00—$126.75$134.15350
17331$33.45$37.1075.54%$580.00—$134.20$143.80910

Forward $476.24. Not enough surviving quotes on both wings to measure the skew here.

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.