Options Skew Analytics

ISRG option chain

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

Data as of 6 November 2026 (end of day)

2026-11-13(7 days)ATM 35.75%±22.43skew +2.82
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
10$24.90$29.30—$427.50—————
056$22.70$28.00—$430.0041.16%$1.95$2.95317
11$20.70$26.00—$432.50—————
3100$18.50$24.00—$435.0039.80%$2.85$3.70558
10$16.30$21.20—$437.50—————
1133$17.00$18.50—$440.0038.69%$3.80$5.001213
11$13.40$17.30—$442.5037.34%$4.50$5.3021
120$13.40$15.10—$445.0037.84%$4.90$6.9040
26$8.40$13.70—$447.5035.39%$5.60$7.00202
3827$10.20$11.70—$450.0038.71%$6.90$9.501970
10$7.60$10.50—$452.5035.10%$8.00$9.0010
722$7.40$9.1036.67%$455.00—$9.20$10.701910
02$6.10$7.8035.81%$457.50—$10.50$11.7002
329$5.10$7.0036.13%$460.00—$11.40$15.50137
—————$462.50—$13.30$14.701413
828$3.70$5.2036.37%$465.00—$14.70$16.40213
347$3.30$4.4036.80%$467.50—$15.90$20.2071
1226$2.85$3.7036.97%$470.00—$17.30$22.6070
155$2.15$3.0036.05%$472.50—$19.20$24.6010
—————$475.00—$21.60$26.6040
—————$477.50—$23.60$28.8030

Forward $453.05. The 25-delta put carries +2.82 volatility points over the 25-delta call.

2026-11-20(14 days)ATM 35.94%±31.89skew +0.43
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
1774$33.40$38.50—$420.00—————
06$31.70$35.80—$422.50—————
3300$29.20$33.50—$425.0037.80%$3.00$4.00733
03$27.60$33.00—$427.5038.43%$3.30$5.103680
0191$25.10$29.40—$430.0038.76%$4.20$5.601070
026$23.60$28.90—$432.5036.01%$3.60$6.00100
1576$23.40$25.50—$435.0035.32%$4.30$6.301771
0109$21.70$23.80—$437.5039.79%$5.70$9.20400
0373$18.40$23.80—$440.0036.57%$6.80$7.801641
025$17.30$20.20—$442.5037.85%$7.40$9.90272
0180$16.60$19.10—$445.0037.23%$8.50$10.40650
023$14.10$17.20—$447.5035.98%$9.60$10.60342
5501$13.50$15.70—$450.0036.83%$10.50$12.60601
024$11.10$14.20—$452.5035.18%$11.60$12.801311
9345$10.90$12.8036.28%$455.00—$12.70$15.20872
28233$8.60$10.5035.84%$460.00—$15.30$16.7010182
13232$6.80$8.7035.99%$465.00—$18.20$19.70260
12392$5.20$6.7035.25%$470.00—$21.20$23.0011035
38473$4.20$5.3035.58%$475.00—$24.20$28.60757
11416$3.10$4.3035.66%$480.00—$27.90$32.90630
12178$2.25$3.3035.40%$485.00—$32.50$37.00110

Forward $452.95. The 25-delta put carries +0.43 volatility points over the 25-delta call.

2026-11-27(21 days)ATM 33.42%±36.36skew +3.32
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
01$61.50$67.60—$390.00—————
06$56.20$63.90—$395.00—————
02$52.10$57.90—$400.00—————
014$47.60$53.20—$405.00—————
—————$410.0039.78%$2.40$3.70421
014$38.70$44.60—$415.00—————
16$34.50$40.20—$420.00—————
164$28.90$32.70—$430.0036.08%$5.70$6.8081
1527$25.40$28.80—$435.0035.74%$6.90$8.40101
321$20.20$24.50—$440.0034.84%$8.20$9.9061
040$18.60$20.80—$445.0034.50%$10.10$11.7040
220$15.60$18.20—$450.0034.50%$12.10$14.2090
37$12.50$15.1033.42%$455.00—$14.20$16.2060
043$10.70$12.7033.66%$460.00—$17.00$18.9045
17$8.60$10.9033.64%$465.00—$19.60$21.8011
17$7.20$9.2033.99%$470.00—$22.60$28.1021
118$5.50$7.2032.98%$475.00—$26.10$28.7010
211$4.30$5.8032.76%$480.00—$28.90$34.9040
—————$490.00—$37.10$43.0030
—————$495.00—$41.50$47.4010
—————$570.00—$114.80$121.00—0

Forward $453.60. The 25-delta put carries +3.32 volatility points over the 25-delta call.

2026-12-04(28 days)ATM 34.48%±43.35skew +4.35
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
01$53.30$60.30—$400.00—————
—————$415.0036.86%$3.90$5.3081
12$38.20$42.90—$420.0038.10%$5.10$7.20170
01$32.80$39.00—$425.0037.29%$6.40$7.9010
12$31.10$36.30—$430.0036.49%$7.80$8.8031
14$27.40$32.00—$435.0036.13%$8.90$10.7031
014$24.00$27.20—$440.0035.02%$10.20$12.1040
04$20.40$24.50—$445.0034.78%$12.20$14.0020
516$18.80$20.90—$450.0035.30%$14.50$16.8081
36$15.70$17.8034.46%$455.00—$16.90$18.6001
359$12.90$16.4034.74%$460.00—————
234$11.90$14.0035.38%$465.00—$21.80$25.20111
035$9.90$11.5034.47%$470.00—$24.90$27.1020
892$8.10$9.6033.92%$475.00—————
057$6.20$8.1033.21%$480.00—————
07$4.90$6.8032.94%$485.00—————
55$3.60$5.5032.17%$490.00—————
—————$580.00—$125.00$131.00—0

Forward $454.00. The 25-delta put carries +4.35 volatility points over the 25-delta call.

2026-12-11(35 days)ATM 34.47%±48.52skew +2.05
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
01$86.90$93.40—$365.00—————
—————$410.0037.59%$4.30$6.0082
01$39.10$45.00—$420.0039.01%$6.10$10.1001
02$35.60$41.50—$425.0035.81%$7.10$9.1050
10$32.90$39.50—$430.0037.18%$8.30$12.3060
01$27.80$34.70—$435.0036.36%$9.60$13.70210
01$26.00$29.00—$440.0035.91%$11.60$15.1041
010$22.40$28.00—$445.0034.49%$13.30$16.1010
3125$20.10$23.00—$450.0035.74%$15.80$19.6010
33$17.40$21.1034.81%$455.00—$18.70$20.7090
218$14.90$18.4034.21%$460.00—————
416$13.30$16.1034.42%$465.00—$22.60$26.1040
08$10.80$14.3033.90%$470.00—————
011$8.50$11.7032.42%$475.00—————
01$7.70$11.3034.16%$480.00—————
01$5.50$8.1033.76%$490.00—————
05$4.00$6.6032.62%$495.00—————
467$3.60$4.4033.48%$505.00—————
—————$580.00—$124.60$131.00—0

Forward $454.55. The 25-delta put carries +2.05 volatility points over the 25-delta call.

2026-12-18(42 days)ATM 33.87%±52.30skew +4.82
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
091$53.30$57.80—$405.0038.49%$5.20$6.10161146
2199$50.10$54.00—$410.0038.18%$6.10$7.102704
148$46.00$50.00—$415.0038.16%$7.10$8.50858
10502$40.70$45.50—$420.0037.72%$8.10$9.803643
145$37.20$41.60—$425.0037.03%$9.40$10.80586
0162$34.50$38.30—$430.0037.13%$11.00$12.6026193
040$30.60$34.20—$435.0036.56%$12.60$14.002250
1230$29.20$30.90—$440.0036.33%$14.20$16.101420
1987$25.70$28.10—$445.0035.81%$16.10$17.903741
67302$23.00$24.90—$450.0035.43%$18.00$20.202489
1327$20.80$22.40—$455.0035.09%$20.30$22.50410
163284$17.10$19.5033.44%$460.00—$23.00$25.601115
9155$16.10$17.7034.59%$465.00—$25.40$27.90141
16305$14.10$15.1033.97%$470.00—$28.50$31.50850
085$12.10$13.3033.71%$475.00—$31.40$33.90158
351,152$10.40$11.5033.41%$480.00—$34.30$38.401391
675$8.90$10.4033.62%$485.00—$38.10$40.80164
4204$7.60$8.6033.08%$490.00—$41.00$45.60772
724$6.40$7.4032.90%$495.00—————
371,329$5.40$6.4032.86%$500.00—$49.40$53.60320
417$4.50$5.4032.65%$505.00—————

Forward $455.20. The 25-delta put carries +4.82 volatility points over the 25-delta call.

2027-01-15(70 days)ATM 34.94%±69.84skew +3.77
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
1161$58.50$63.20—$405.0038.10%$8.60$11.10580
3171$54.60$59.30—$410.0038.32%$10.70$12.004023
092$50.40$56.70—$415.0037.46%$10.80$13.802850
0166$47.40$52.40—$420.0038.37%$13.30$15.703080
099$44.10$49.30—$425.0036.56%$13.10$16.90580
3243$40.90$45.30—$430.0036.64%$16.00$17.803160
293$38.10$42.10—$435.0036.67%$18.10$19.701680
7288$34.30$38.60—$440.0035.92%$18.40$22.506530
880$31.70$36.30—$445.0034.43%$19.00$24.10480
13458$30.00$33.30—$450.0036.33%$23.90$26.901990
0157$26.90$30.10—$455.0035.15%$25.60$28.40821
6240$25.00$27.4035.15%$460.00—$28.30$30.902941
0149$21.90$25.1034.47%$465.00—$29.00$34.80220
3474$20.60$23.0034.89%$470.00—$33.80$37.201880
1239$19.40$20.8035.13%$475.00—$36.80$39.70270
31511$16.70$19.0034.50%$480.00—$39.50$43.601083
168$14.90$18.1034.88%$485.00—$42.50$46.90432
2229$13.00$17.2035.04%$490.00—$45.70$50.502065
061$12.10$14.0034.14%$495.00—$50.20$54.00250
6683$10.60$12.5033.82%$500.00—$53.10$57.7036362
666$9.40$11.2033.69%$505.00—$56.00$61.5040

Forward $456.51. The 25-delta put carries +3.77 volatility points over the 25-delta call.

2027-02-19(105 days)ATM 37.10%±91.08skew +4.70
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
024$62.50$68.40—$410.0040.49%$16.60$19.701110
03$59.20$64.00—$415.0039.27%$17.80$20.001200
079$56.20$61.70—$420.0039.06%$19.40$21.70252
138$52.70$58.40—$425.0037.99%$19.70$23.40220
225$50.80$54.10—$430.0038.31%$22.90$24.80430
026$46.60$50.60—$435.0038.38%$24.60$27.5030
953$44.30$47.70—$440.0038.34%$26.90$29.60190
152$41.20$46.60—$445.0038.13%$29.00$31.80790
272$38.20$42.40—$450.0037.75%$31.10$33.90181
036$36.10$40.80—$455.0036.81%$32.00$36.3070
1848$32.50$36.6036.85%$460.00—$34.90$38.80150
053$30.90$34.2037.02%$465.00—$38.20$40.90130
362$29.00$32.3037.20%$470.00—$41.20$44.7040
035$25.80$29.5036.12%$475.00—$43.40$47.6090
043$24.30$27.4036.18%$480.00—$46.40$50.6050
141$23.20$27.7037.61%$485.00—————
012$21.00$25.8037.22%$490.00—————
014$19.70$24.1037.31%$495.00—$54.00$59.8010
1211$17.90$21.0036.26%$500.00—————
62$16.50$18.7035.74%$505.00—————
03$15.40$17.3035.80%$510.00—$66.40$70.5010

Forward $457.67. The 25-delta put carries +4.70 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.