Options Skew Analytics

CAT 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 42.24%±25.49skew -1.82
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
527$28.20$35.15—$785.0042.74%$1.11$1.7845154
1198$24.35$31.05—$790.00—————
323$20.50$26.00—$795.00—————
425$18.65$24.15—$797.5043.46%$2.96$4.70295
22114$16.40$22.00—$800.0039.66%$3.00$4.5022161
697$12.25$17.00—$805.0040.29%$4.35$6.458760
730$11.75$16.80—$807.5042.02%$5.90$7.501210
82128$11.00$13.50—$810.0043.13%$6.60$9.3521324
—————$812.5044.42%$7.45$11.353110
27510$9.00$11.45—$815.0042.18%$8.35$11.805613
1250$7.40$10.9042.66%$817.50—$8.65$14.00291
49214$6.45$8.5040.22%$820.00—$10.15$15.85611
342$5.15$8.0540.71%$822.50—$11.45$17.2020
4375$4.80$6.9041.36%$825.00—$11.75$17.35344
—————$827.50—$13.95$20.3010
131456$3.45$4.5039.67%$830.00—$16.00$22.25360
2140$2.85$4.5541.48%$832.50—————
52267$2.36$3.7541.04%$835.00—$19.95$25.65111
—————$840.00—$25.00$31.35511
—————$845.00—$30.80$36.45160
—————$850.00—$33.50$39.15264

Forward $815.15. The 25-delta put carries -1.82 volatility points over the 25-delta call.

2026-10-02(9 days)ATM 37.91%±48.53skew -1.09
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
290$37.70$45.60—$780.0037.09%$5.40$6.6011176
135$33.90$40.80—$785.0036.78%$6.50$7.759613
016$30.35$37.40—$790.0036.78%$7.85$9.256749
023$26.70$33.25—$795.0036.48%$9.25$10.809954
02$26.05$31.55—$797.5036.37%$9.90$11.803910
2155$24.70$30.05—$800.0036.73%$11.25$12.657421
864$21.65$25.60—$805.0036.45%$13.00$14.65539
2165$20.25$23.90—$810.0036.15%$14.75$17.055231
2514$19.10$21.20—$812.5033.02%$12.80$18.20714
6216$17.85$20.05—$815.0036.96%$18.15$19.35263
6912$16.60$20.0538.08%$817.50—$18.30$20.95817
543$15.50$16.7035.96%$820.00—$19.10$22.10540
614$14.50$16.3536.78%$822.50—$20.35$24.9021
50528$13.50$15.8537.36%$825.00—$21.70$24.95240
1268$12.40$13.7536.14%$827.50—$23.15$26.8030
5247$11.45$12.6035.91%$830.00—$23.75$28.252612
66$10.65$12.7037.02%$832.50—$26.25$30.1090
285$8.45$10.7534.41%$835.00—$27.05$32.85170
16116$7.30$9.7035.30%$840.00—$30.90$36.25175
31236$6.40$8.7536.26%$845.00—$33.85$40.50160
64161$5.70$8.3537.86%$850.00—$37.90$42.751516

Forward $815.20. The 25-delta put carries -1.09 volatility points over the 25-delta call.

2026-10-09(16 days)ATM 36.10%±61.70skew +2.67
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
07$46.50$54.15—$775.0036.44%$7.85$10.00572
06$42.75$50.20—$780.0036.28%$9.00$11.404541
09$39.15$46.00—$785.0035.41%$8.75$13.65182
010$36.00$43.40—$790.0037.29%$12.80$15.15450
129$32.70$40.00—$795.0036.53%$14.35$16.30142
20$31.15$38.75—$797.5036.66%$14.70$18.0543
1221$31.55$37.10—$800.0036.19%$16.05$18.10297
528$28.60$33.70—$805.0035.71%$16.45$21.302438
3534$25.90$29.00—$810.0036.63%$20.85$22.701219
84$23.60$30.35—$812.5035.99%$21.15$23.95114
4417$23.15$27.75—$815.0036.41%$21.90$26.252711
132$22.30$26.5536.68%$817.50—————
432$19.45$25.3535.43%$820.00—$24.40$29.90120
08$18.80$23.6535.37%$822.50—————
044$19.30$22.7536.68%$825.00—$27.35$32.5581
2430$17.15$20.4536.45%$830.00—$30.10$35.4090
225$13.10$18.2534.61%$835.00—$32.85$38.4540
131$10.70$16.9534.44%$840.00—$35.05$41.7520
215$9.50$14.4534.02%$845.00—$37.15$45.2510
039$8.25$12.3533.61%$850.00—$41.20$48.5040
—————$855.00—$44.95$52.7020

Forward $816.38. The 25-delta put carries +2.67 volatility points over the 25-delta call.

2026-10-16(23 days)ATM 35.61%±72.94skew +0.45
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
01$50.50$56.80—$775.0035.52%$11.60$13.10164
0102$46.90$54.70—$780.0035.45%$13.15$14.5563187
—————$785.0034.98%$14.35$16.003319
2272$42.20$45.30—$790.0035.59%$16.70$18.1541224
05$36.75$43.75—$795.0034.92%$17.95$19.75920
121$36.30$39.90—$797.5034.94%$18.95$20.80612
21208$35.30$39.45—$800.0035.22%$20.20$22.1072875
815$33.55$36.60—$805.0034.87%$21.95$24.203117
65620$30.80$34.10—$810.0034.91%$24.65$26.25296143
24$29.55$32.45—$812.5034.94%$25.40$28.00530
4651$26.60$30.85—$815.0034.65%$26.60$28.85102
3331$27.25$28.6535.18%$817.50—$27.95$30.201214
164407$26.55$28.0035.78%$820.00—$27.45$31.4550225
6541$25.25$27.8536.28%$822.50—$29.55$33.35140
412$24.35$25.6035.69%$825.00—$30.95$34.25152
52363$22.25$24.3536.21%$830.00—$34.10$37.451700
143$20.10$22.7036.30%$835.00—$36.95$40.8070
31417$18.40$21.0036.49%$840.00—$39.90$44.0026217
016$15.95$18.0035.19%$845.00—$43.55$46.7020
47401$15.00$16.5535.71%$850.00—$47.05$50.152063
228$12.60$15.0535.07%$855.00—————

Forward $816.00. The 25-delta put carries +0.45 volatility points over the 25-delta call.

2026-10-23(30 days)ATM 35.34%±82.79skew +3.15
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
010$62.05$68.60—$765.0037.99%$11.50$17.25580
216$58.60$66.15—$770.0035.13%$12.25$15.104921
018$54.85$61.75—$775.0036.54%$14.60$18.05300
037$51.35$59.40—$780.0035.56%$13.75$20.65400
019$47.45$56.15—$785.0035.27%$16.10$21.35142
224$45.00$52.05—$790.0035.41%$17.00$24.45140
022$41.85$48.25—$795.0034.25%$19.40$24.00340
328$38.90$45.80—$800.0036.03%$22.40$28.40443
328$36.05$42.55—$805.0035.48%$24.60$29.70140
341$33.25$40.05—$810.0034.22%$25.75$30.95515
412$31.40$36.95—$815.0035.67%$29.15$35.20123
023$28.15$34.7535.30%$820.00—$30.75$38.75461
150$26.70$32.3035.63%$825.00—$33.70$41.80550
229$24.05$29.2034.84%$830.00—$36.15$43.70260
06$22.40$27.8035.38%$835.00—$39.70$46.90130
016$19.25$26.9535.29%$840.00—$42.25$50.6030
036$19.70$23.0535.37%$845.00—$45.65$53.7560
562$18.20$21.3035.45%$850.00—$49.85$56.95201
26$14.35$20.8534.80%$855.00—$52.75$60.25150
2821$13.65$18.2534.60%$860.00—$55.75$63.95100
1623$12.20$17.3534.84%$865.00—$59.40$67.50153

Forward $817.01. The 25-delta put carries +3.15 volatility points over the 25-delta call.

2026-10-30(37 days)ATM 42.83%±111.23
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
105$70.10$77.35—$765.0042.54%$20.25$23.65236
07$66.50$74.55—$770.0043.55%$21.70$27.55197
037$63.20$71.30—$775.0042.34%$23.50$27.20209
04$60.00$67.65—$780.0041.81%$23.75$29.80189
03$57.00$64.45—$785.0042.35%$26.60$32.00112
49$54.00$61.45—$790.0041.73%$28.25$33.35116
017$51.20$58.45—$795.0041.83%$30.60$35.60960
05$49.05$55.10—$800.0041.38%$32.05$37.8042379
1220$45.60$52.90—$805.0042.38%$35.00$41.651214
022$44.70$51.25—$810.0042.43%$37.65$44.0550
121$40.20$47.95—$815.0042.46%$40.45$46.45172
07$37.95$44.8042.09%$820.00—$42.35$49.00170
324$37.40$43.0043.12%$825.00—$45.90$51.60110
26$33.40$41.0042.29%$830.00—$47.85$54.45100
03$31.25$38.9542.25%$835.00—$49.85$57.3040
17$29.80$36.8042.42%$840.00—$52.90$60.2080
015$27.20$33.8541.54%$845.00—$55.85$63.2010
514$28.30$32.1043.01%$850.00—$59.35$66.3570
27$25.85$30.9042.92%$855.00—$62.85$69.5511
043$23.75$29.7542.95%$860.00—$66.25$72.8510
221$22.95$26.9542.71%$865.00—$68.45$76.2010

Forward $815.63. Not enough surviving quotes on both wings to measure the skew here.

2026-11-20(58 days)ATM 41.28%±134.71skew +1.33
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
032$108.15$117.85—$720.0041.99%$15.65$16.8030613
019$100.95$109.55—$730.0041.77%$17.90$19.302436
0507$94.05$102.10—$740.0041.65%$20.60$22.0533816
049$88.75$92.95—$750.0041.77%$23.95$25.2026736
275$82.10$88.65—$760.0041.34%$26.60$28.4038447
275$77.05$82.70—$770.0041.28%$30.25$32.0023211
067$70.95$76.15—$780.0041.32%$34.10$36.2026739
556$64.25$69.25—$790.0041.22%$38.25$40.4014816
27490$61.10$64.05—$800.0041.13%$42.75$44.8548741
61178$55.90$59.45—$810.0041.26%$47.05$50.6526513
37117$51.40$53.1040.92%$820.00—$52.15$55.051324
19100$46.95$49.5541.28%$830.00—$57.60$61.651636
12150$42.85$44.3040.89%$840.00—$63.15$66.20990
11269$38.90$40.3540.84%$850.00—$68.90$72.951540
5495$35.30$36.7040.83%$860.00—$75.55$78.851000
23137$31.95$33.9041.06%$870.00—$79.70$85.75650
22116$28.80$30.3540.85%$880.00—$88.35$92.50720
4150$25.95$27.4540.84%$890.00—$93.95$101.451630
18518$23.35$24.4040.67%$900.00—$103.20$107.4517825
2—$20.55$22.9040.90%$910.00—$109.85$119.45—0
36552$17.95$19.8540.32%$920.00—$118.60$126.001360

Forward $818.64. The 25-delta put carries +1.33 volatility points over the 25-delta call.

2026-12-18(86 days)ATM 38.71%±154.54skew +0.78
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
0100$141.30$149.20—$690.0041.11%$14.60$16.356956
0101$131.60$141.35—$700.0041.00%$17.10$18.1524710
041$116.45$127.15—$720.0040.59%$21.55$23.101937
060$102.20$112.55—$740.0040.01%$26.55$28.753541
043$91.90$99.80—$760.0040.16%$33.60$36.104880
2112$79.15$87.35—$780.0039.69%$40.65$43.7018814
6156$74.25$78.70—$790.0040.26%$46.40$48.451753
12171$70.80$75.15—$800.0039.51%$49.05$52.8032627
745$66.00$69.05—$810.0040.03%$55.90$57.352315
11111$61.45$64.80—$820.0039.39%$58.70$62.851090
392$55.00$61.9539.30%$830.00—$63.40$68.351293
0319$50.00$56.1038.57%$840.00—$70.55$74.3526812
16180$48.45$50.8038.94%$850.00—$77.00$80.6516019
45282$44.55$48.9039.51%$860.00—$82.50$85.95802
778$39.70$45.9539.29%$870.00—$88.90$93.502114
0105$36.70$43.1039.56%$880.00—$94.95$99.20730
062$34.40$36.6038.72%$890.00—$102.30$106.75730
6423$31.10$33.8538.63%$900.00—$109.30$114.5516410
2186$27.05$28.6539.06%$920.00—$123.55$133.40670
1552$21.05$24.8538.77%$940.00—$139.60$146.301690
0220$17.55$21.7539.23%$960.00—$153.85$165.05390

Forward $822.37. The 25-delta put carries +0.78 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.