Options Skew Analytics

NSC option chain

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

Data as of 23 September 2026 (end of day)

2026-11-20(58 days)ATM 21.87%±27.67skew +5.22
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
—————$280.0027.51%$1.80$2.3043
01$29.00$31.80—$290.0025.88%$2.95$3.6033
01$21.20$23.50—$300.0025.82%$4.80$6.8033
20$14.40$16.90—$310.0023.49%$7.90$8.8033
6132$9.00$10.3021.69%$320.00—————
23$5.10$6.0020.89%$330.00—$17.90$20.204000
773$2.70$3.3020.60%$340.00—————
27$1.35$1.8020.70%$350.00—————

Forward $317.35. The 25-delta put carries +5.22 volatility points over the 25-delta call.

2027-01-15(114 days)ATM 22.29%±39.60skew +3.16
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
02$169.30$173.50—$145.00—————
01$149.70$153.60—$165.00—————
01$144.80$148.70—$170.00—————
03$120.00$124.30—$195.00—————
010$115.10$119.40—$200.00—————
013$105.50$109.40—$210.00—————
024$95.70$99.90—$220.00—————
07$86.40$90.20—$230.00—————
02$76.80$80.40—$240.00—————
443$67.70$71.00—$250.00—————
049$58.10$61.80—$260.0027.03%$1.50$2.154780
018$49.20$53.00—$270.00—————
089$41.10$44.50—$280.0025.54%$3.40$5.201220
0163$32.80$36.30—$290.0024.77%$5.10$7.501100
0116$25.70$28.80—$300.0023.64%$7.50$10.00910
049$19.00$22.20—$310.0022.12%$10.90$12.501290
295$13.80$15.4022.28%$320.00—$15.40$18.00630
1224$9.50$12.2022.65%$330.00—$20.10$23.00380
0106$6.40$8.6022.30%$340.00—$27.00$29.70170
0146$3.80$5.8021.62%$350.00—$34.80$39.0030
—————$360.00—$43.40$47.3030

Forward $317.87. The 25-delta put carries +3.16 volatility points over the 25-delta call.

2027-03-19(177 days)ATM 22.94%±51.07skew +2.55
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
010$87.70$91.50—$230.00—————
01$60.80$64.50—$260.00—————
06$52.10$56.10—$270.0026.25%$3.90$6.201010
05$43.90$48.00—$280.0025.64%$5.60$8.304550
010$36.50$40.30—$290.0024.66%$7.70$10.5070
06$29.70$33.30—$300.0024.03%$10.50$13.60490
0101$24.00$27.10—$310.0023.63%$14.40$17.30950
028$18.20$21.8023.21%$320.00—$18.60$22.10930
015$13.90$16.7022.61%$330.00—$24.30$27.50340
025$10.70$13.3022.81%$340.00—$30.40$33.5090
028$7.00$10.1021.99%$350.00—$37.40$40.70130
016$5.30$7.6022.12%$360.00—$45.30$49.0010

Forward $319.64. The 25-delta put carries +2.55 volatility points over the 25-delta call.

2027-06-17(267 days)ATM 23.85%±65.78skew +3.74
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
01$165.40$169.50—$150.00—————
01$150.90$155.10—$165.00—————
01$122.40$126.50—$195.00—————
01$73.50$77.50—$250.00—————
03$65.30$69.50—$260.0026.67%$4.70$7.10560
016$57.40$61.50—$270.0026.24%$6.50$9.1060
013$50.40$54.00—$280.0025.72%$8.60$11.50150
025$43.00$46.90—$290.0025.32%$11.30$14.401,08715
018$36.60$40.10—$300.0024.76%$14.40$17.60712
028$30.50$34.30—$310.0024.53%$18.20$21.80690
031$25.10$28.90—$320.0024.33%$22.80$26.40380
031$20.50$23.8023.81%$330.00—$28.00$31.50692
010$16.20$19.4023.23%$340.00—$34.00$37.8040
063$12.70$15.7022.84%$350.00—————
04$9.50$12.6022.36%$360.00—————
071$7.00$10.0021.98%$370.00—————
053$5.00$7.9021.65%$380.00—————

Forward $322.48. The 25-delta put carries +3.74 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.