Options Skew Analytics

GLW 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 65.28%±9.45skew -2.26
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
—————$141.0074.75%$0.12$0.15448156
012$16.90$19.35—$142.00—————
063$15.80$18.30—$143.00—————
527$14.85$17.40—$144.00—————
36505$14.40$15.65—$145.0069.98%$0.25$0.304,0521,161
234$12.90$15.20—$146.0069.89%$0.30$0.4030480
246$12.20$13.80—$147.0068.24%$0.36$0.45199128
056$10.95$13.65—$148.0067.59%$0.45$0.54267143
2222$10.35$12.55—$149.0067.56%$0.56$0.6812129
1321,058$9.65$10.75—$150.0066.66%$0.70$0.781,297605
20321$8.10$8.55—$152.5065.49%$1.07$1.29554190
88723$6.25$6.80—$155.0065.04%$1.79$1.904771,072
230478$4.70$5.05—$157.5064.83%$2.68$2.8434196
6191,295$3.45$3.7065.29%$160.00—$3.80$4.15241231
287646$2.32$2.6364.37%$162.50—$5.25$5.704924
5681,112$1.70$1.8866.66%$165.00—$6.90$7.459212
127687$1.17$1.3067.74%$167.50—$8.85$9.45333
8562,344$0.77$0.8868.49%$170.00—$10.95$11.5022114
636335$0.54$0.6170.49%$172.50—————
571752$0.37$0.4172.00%$175.00—$14.80$16.80331
84108$0.21$0.3173.30%$177.50—————

Forward $159.60. The 25-delta put carries -2.26 volatility points over the 25-delta call.

2026-10-02(10 days)ATM 60.36%±15.95skew -2.87
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
—————$141.0060.91%$0.68$0.901123
—————$142.0061.00%$0.79$1.054037
028$16.70$19.40—$143.0060.62%$0.97$1.115751
026$15.45$18.40—$144.0060.53%$1.08$1.305832
1069$14.95$17.70—$145.0059.87%$1.26$1.38601133
—————$146.0059.99%$1.43$1.6087214
02$13.65$15.80—$147.0059.82%$1.63$1.7930154
215$12.45$14.50—$148.0059.41%$1.80$2.015791
03$11.65$14.40—$149.0059.35%$2.03$2.261546
26556$11.30$12.70—$150.0059.56%$2.35$2.511,010285
8109$10.15$10.90—$152.5059.83%$3.05$3.4022572
27243$8.65$9.20—$155.0060.09%$4.00$4.3520447
3044$7.25$7.80—$157.5060.03%$5.05$5.4512257
3801,129$6.00$6.4060.36%$160.00—$6.30$6.7530852
56134$4.90$5.3060.38%$162.50—$7.70$8.1573
231501$4.00$4.3560.65%$165.00—$9.25$9.7542648
27122$3.30$3.5061.05%$167.50—————
823660$2.66$2.8761.63%$170.00—$12.40$13.801245
21100$2.16$2.3562.44%$172.50—$14.05$16.3010
188447$1.73$1.8962.92%$175.00—$16.15$18.154250
70191$1.38$1.5363.54%$177.50—————

Forward $159.67. The 25-delta put carries -2.87 volatility points over the 25-delta call.

2026-10-09(17 days)ATM 59.17%±20.38skew -2.75
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
1256$20.25$23.00—$140.0058.57%$1.31$1.6176264
—————$141.0058.36%$1.46$1.7720
01$18.55$21.35—$142.0058.24%$1.67$1.91018
—————$143.0057.84%$1.83$2.0811
—————$144.0058.01%$2.05$2.32021
2540$16.25$17.80—$145.0058.10%$2.28$2.57624121
—————$146.0057.86%$2.51$2.79913
—————$147.0057.86%$2.73$3.1010
—————$148.0058.32%$3.00$3.5033
—————$149.0057.85%$3.25$3.7512
271$13.10$14.60—$150.0058.09%$3.65$4.0515234
22$11.65$12.40—$152.5058.37%$4.60$4.9532
1227$10.15$10.95—$155.0058.62%$5.60$6.0510518
1420$8.85$9.55—$157.5059.05%$6.70$7.35118
138203$7.55$8.3059.10%$160.00—$8.00$8.6025820
916$6.50$7.2059.32%$162.50—$9.30$10.0032
34485$5.60$6.1559.43%$165.00—$10.60$11.603303
53$5.00$5.4060.97%$167.50—$12.15$13.2002
143483$4.30$4.5561.02%$170.00—$13.85$14.95290
218$3.50$3.9060.68%$172.50—$15.40$17.5070
64252$3.00$3.3061.07%$175.00—$17.35$19.25470

Forward $159.62. The 25-delta put carries -2.75 volatility points over the 25-delta call.

2026-10-16(24 days)ATM 59.02%±24.20skew -1.93
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
51,406$21.20$23.45—$140.0058.38%$2.20$2.393,373222
—————$141.0058.29%$2.40$2.60717
—————$142.0058.22%$2.63$2.811829
—————$143.0058.41%$2.87$3.10312
03$17.95$20.50—$144.0058.05%$3.05$3.35436
3643$17.55$18.85—$145.0058.28%$3.40$3.603,686160
—————$146.0058.17%$3.60$3.9524
—————$147.0058.33%$3.90$4.3023
—————$148.0058.36%$4.25$4.601750
60$15.35$16.70—$149.0058.46%$4.60$4.95514
271,558$14.80$15.25—$150.0058.43%$4.95$5.302,298784
1212$13.20$13.85—$152.5058.38%$5.90$6.25744
24938$11.80$12.40—$155.0058.62%$6.95$7.401,50011
28383$10.45$11.10—$157.5057.87%$7.90$8.556987
5862,276$9.30$9.7558.81%$160.00—$9.40$9.901,24446
87$8.20$8.7059.06%$162.50—$10.60$11.25601
43510,014$7.20$7.6559.00%$165.00—$12.10$12.7517648
1034$6.35$6.7559.29%$167.50—————
5213,446$5.65$5.8559.49%$170.00—$15.35$16.105942
1521$4.80$5.2059.46%$172.50—————
581,367$4.30$4.5560.10%$175.00—$19.00$19.751760

Forward $159.87. The 25-delta put carries -1.93 volatility points over the 25-delta call.

2026-10-23(31 days)ATM 58.58%±27.34skew -3.64
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
43$59.05$61.60—$100.00—————
05$48.60$51.75—$110.00—————
01$43.70$46.90—$115.00—————
16$39.65$42.15—$120.0060.57%$0.44$0.6017713
04$34.30$37.45—$125.0059.35%$0.71$0.9586424
03$30.30$32.95—$130.0058.21%$1.11$1.4614765
59$25.65$28.70—$135.0057.08%$1.70$2.1515153
1209$22.10$24.70—$140.0056.40%$2.70$3.0018168
235$18.30$20.70—$145.0056.76%$4.00$4.4512090
097$15.15$17.85—$150.0056.21%$5.40$6.2528533
977$12.55$14.00—$155.0057.96%$7.30$9.104618
11143$10.15$11.60—$160.0058.29%$9.90$11.552217
13157$7.80$9.9059.00%$165.00—$12.80$15.001950
15325$6.10$8.6060.76%$170.00—$16.00$18.00131
39148$4.75$6.0558.25%$175.00—$19.50$22.15230
26176$3.75$4.5558.07%$180.00—$23.25$26.0530
16125$2.90$4.1060.41%$185.00—$27.30$30.0030
2496$2.09$3.0059.26%$190.00—$31.60$34.4020
1862$1.80$2.4461.08%$195.00—————
—————$200.00—$40.60$43.1550
—————$210.00—$49.85$52.65210

Forward $160.15. The 25-delta put carries -3.64 volatility points over the 25-delta call.

2026-10-30(38 days)ATM 64.04%±33.22skew -0.39
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
05$53.80$57.00—$105.00—————
03$44.95$47.55—$115.0067.73%$0.60$1.0012413
02$39.85$42.95—$120.0066.29%$1.02$1.301129
01$35.50$38.55—$125.0066.46%$1.59$1.9817227
044$31.60$34.30—$130.0065.00%$2.26$2.6332018
029$27.55$30.30—$135.0065.18%$3.35$3.6512883
331$23.90$26.15—$140.0065.00%$4.55$5.00201107
135$20.80$23.00—$145.0065.21%$6.05$6.7514347
551$17.45$19.20—$150.0065.77%$8.00$8.804210
9159$15.25$16.85—$155.0065.36%$9.65$11.40300
1265$12.95$14.35—$160.0064.60%$12.35$13.404530
2544$10.45$12.2063.91%$165.00—$14.95$16.5530
1681$8.70$9.6562.68%$170.00—$18.00$20.25101
166612$7.50$8.0063.72%$175.00—$21.45$23.4540
1099$5.95$7.0064.35%$180.00—$25.10$27.2001
1058$4.85$6.0065.11%$185.00—$29.05$31.2561
1884$4.00$5.0065.60%$190.00—$33.15$35.0020
7399$3.25$4.2566.23%$195.00—————
12317$2.65$3.3065.75%$200.00—$41.75$44.2056
319$2.01$2.9266.33%$205.00—————
522$1.87$2.5668.45%$210.00—————

Forward $160.78. The 25-delta put carries -0.39 volatility points over the 25-delta call.

2026-11-20(59 days)ATM 63.34%±40.83skew -2.27
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
5107$54.95$57.65—$105.0066.19%$0.71$0.9192912
1112$50.50$53.05—$110.0064.92%$1.05$1.235,70641
049$45.85$48.50—$115.0064.21%$1.53$1.711,360156
3201$41.55$44.20—$120.0063.84%$2.18$2.382,311129
0178$37.10$40.00—$125.0063.17%$2.95$3.201,42449
4228$33.65$35.95—$130.0063.08%$4.00$4.301,833170
1574$29.65$32.40—$135.0063.10%$5.35$5.602,08539
1110,463$26.60$28.50—$140.0063.00%$6.80$7.252,29458
9261$23.45$24.65—$145.0063.11%$8.60$9.151,7294
821,507$20.95$21.60—$150.0062.85%$10.75$11.051,315150
11469$18.35$19.05—$155.0062.88%$13.10$13.401,48818
45814$15.95$16.60—$160.0063.30%$15.65$16.2563744
226728$13.90$14.4063.32%$165.00—$18.55$19.051,04913
972,158$12.25$12.5563.91%$170.00—$21.70$22.201,9877
28702$10.50$11.0564.16%$175.00—$25.05$25.6049410
70979$9.10$9.5064.23%$180.00—$28.55$29.051,9341
11575$7.80$8.1564.18%$185.00—$32.05$32.851200
189777$6.75$7.1064.62%$190.00—$35.65$37.151410
14409$5.80$6.2065.00%$195.00—$39.40$41.601320
781,556$5.00$5.3565.26%$200.00—$43.60$45.752030
151,421$3.75$4.0065.98%$210.00—$52.25$54.50620

Forward $160.33. The 25-delta put carries -2.27 volatility points over the 25-delta call.

2026-12-18(87 days)ATM 61.81%±48.51skew -3.00
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
4615$55.50$58.65—$105.0062.28%$1.31$1.536981
0258$51.35$54.30—$110.0061.90%$1.80$2.152,0783
240$47.15$49.80—$115.0061.86%$2.56$2.881,35411
1316$43.30$45.75—$120.0061.11%$3.25$3.803,57225
0212$39.00$41.80—$125.0061.61%$4.50$4.9584514
0244$35.60$38.40—$130.0061.02%$5.60$6.252,4683
0353$32.25$34.85—$135.0061.01%$7.30$7.6060122
3556$28.70$31.65—$140.0061.49%$9.05$9.609779
3619$25.80$28.00—$145.0061.46%$11.05$11.5561713
4454$23.50$24.90—$150.0061.27%$13.30$13.602,41129
4304$21.20$22.05—$155.0062.11%$15.70$16.5553947
341,734$18.90$19.85—$160.0061.65%$18.45$18.801,55342
7276$16.60$18.1562.00%$165.00—$21.20$21.902512
481,424$15.00$15.7561.74%$170.00—$24.30$25.451,4021
46467$13.10$14.5062.25%$175.00—$27.10$28.8029710
23433$11.85$12.6562.31%$180.00—$30.55$32.001,5010
11706$10.60$11.1562.43%$185.00—$34.50$35.502730
11520$9.15$9.9062.13%$190.00—$38.10$39.801390
19476$8.25$8.9062.78%$195.00—$41.55$43.801630
351,304$7.45$7.7062.83%$200.00—$45.75$47.602,4740
2546$5.80$6.5064.01%$210.00—$54.00$56.301410

Forward $160.76. The 25-delta put carries -3.00 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.