Options Skew Analytics

STX 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 79.96%±54.56skew -0.53
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
641$43.30$46.40—$885.0080.32%$7.50$8.203127
14148$39.20$42.70—$890.0079.84%$8.70$9.50130137
1032$37.10$40.70—$892.5079.91%$9.40$10.30932
1580$36.10$38.90—$895.0080.43%$10.20$11.307525
1317$33.50$37.60—$897.5079.31%$10.80$11.80342
107359$33.10$35.60—$900.0079.68%$11.90$12.606559
1121$31.60$33.50—$902.5080.05%$12.70$13.80104
25105$30.00$32.00—$905.0079.86%$13.60$14.706123
98$28.50$30.40—$907.5079.11%$14.40$15.501167
48206$27.00$29.10—$910.0080.11%$15.60$16.909023
1520$25.60$27.70—$912.5080.35%$16.60$18.2077
3376$24.20$26.30—$915.0079.86%$17.70$19.10269
83364$21.80$23.60—$920.0080.05%$20.10$21.6031143
6294$19.60$20.9079.93%$925.00—$22.50$24.30229
105136$17.30$18.8080.06%$930.00—$25.10$27.102938
43126$15.00$17.1080.28%$935.00—$28.20$30.00310
79396$13.50$14.8080.22%$940.00—$31.20$33.20332
28129$12.00$13.1080.69%$945.00—$34.70$36.50155
265231$10.60$11.2080.32%$950.00—$38.10$40.101034
3353$9.10$10.5081.63%$955.00—$40.00$44.90530
162103$7.90$8.8080.85%$960.00—$44.50$48.70130

Forward $921.85. The 25-delta put carries -0.53 volatility points over the 25-delta call.

2026-10-02(9 days)ATM 72.64%±105.35skew -2.45
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
862$66.00$74.60—$875.0072.25%$19.00$22.80153
938$62.80$71.10—$880.0072.57%$21.10$24.502535
926$59.80$67.60—$885.0072.33%$22.60$26.404259
1451$56.80$64.40—$890.0072.57%$24.70$28.402222
515$53.90$61.30—$895.0072.63%$26.70$30.505237
34136$51.10$58.20—$900.0072.69%$28.90$32.601693
1117$48.50$55.30—$905.0074.36%$31.90$35.902662
1360$45.90$52.50—$910.0073.81%$33.00$38.805710
920$43.40$49.80—$915.0074.15%$35.40$41.60469
3452$41.00$47.20—$920.0072.23%$37.50$42.305615
2655$39.40$44.8074.07%$925.00—$39.90$47.20552
5341$35.50$42.4072.61%$930.00—$42.50$50.60281
128$35.00$40.2074.12%$935.00—$44.30$52.40310
1586$32.20$38.0073.47%$940.00—$46.80$55.90290
927$30.30$36.0073.62%$945.00—$49.80$58.3051
1095$28.80$34.0073.97%$950.00—$53.20$61.501062
019$25.20$32.2072.48%$955.00—$55.70$64.90100
26043$24.80$30.0073.32%$960.00—$58.90$67.70150
294$22.20$28.7072.85%$965.00—————
216$22.50$27.0074.53%$970.00—$66.30$75.20340
1021$21.20$25.4074.70%$975.00—$69.70$79.6010

Forward $923.55. The 25-delta put carries -2.45 volatility points over the 25-delta call.

2026-10-09(16 days)ATM 70.65%±136.85
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
13$77.10$84.80—$875.0070.79%$29.20$34.3042
12$74.20$82.30—$880.0070.66%$30.90$36.3050
02$71.20$79.40—$885.0070.72%$32.90$38.4010
227$68.40$77.00—$890.0070.80%$35.00$40.60170
013$65.70$74.10—$895.0070.65%$36.90$42.8020
1933$63.00$70.90—$900.0070.54%$38.80$45.2030
012$60.40$68.40—$905.0070.26%$41.40$46.8011
136$57.80$65.80—$910.0071.01%$44.50$49.6023
07$55.40$63.20—$915.0071.78%$47.30$52.9036
210$53.00$60.70—$920.0070.63%$48.50$55.0023
313$51.10$58.20—$925.0070.82%$51.30$57.7030
112$48.50$55.0070.06%$930.00—$53.40$60.5020
01$46.30$53.6070.63%$935.00—$56.50$63.30220
113$44.80$51.1070.85%$940.00—$58.70$66.3040
010$42.20$49.3070.73%$945.00—————
222$40.80$46.9070.90%$950.00—$64.90$72.5020
16$38.30$45.4070.85%$955.00—————
210$36.50$43.2070.71%$960.00—————
03$34.80$41.7071.02%$965.00—————
211$33.20$39.5070.84%$970.00—————
01$31.70$37.5070.77%$975.00—————

Forward $925.15. Not enough surviving quotes on both wings to measure the skew here.

2026-10-16(23 days)ATM 70.35%±163.12
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
3189$104.10$107.00—$850.0069.35%$30.80$32.1052257
02$99.90$104.30—$855.00—————
1183$96.60$101.60—$860.0069.11%$34.10$35.60723
—————$865.0069.24%$36.30$37.40110
5144$91.40$94.20—$870.0069.30%$38.20$39.5011218
015$88.60$91.80—$875.0069.63%$40.50$41.803258
4133$85.40$88.60—$880.0069.64%$42.20$44.3028413
18$82.60$85.60—$885.0069.19%$44.10$45.9072
1392$80.00$83.10—$890.0069.63%$46.20$49.00813
2721$77.90$79.70—$895.0069.54%$48.70$50.901510
3901,538$75.40$77.50—$900.0069.44%$51.30$52.80110135
3610$72.20$75.30—$905.0069.55%$53.70$55.401349
26126$69.90$72.20—$910.0069.75%$55.70$58.708528
128244$64.80$67.30—$920.0069.79%$61.30$63.409856
1549$60.90$63.0070.34%$930.00—$66.20$69.402611
60143$56.70$58.5070.35%$940.00—$72.30$74.209141
115181$52.60$54.7070.55%$950.00—$77.90$80.80366
4165$48.20$51.3070.55%$960.00—$84.30$86.30195
1584$45.00$46.8070.36%$970.00—$90.60$93.20748
40150$41.70$43.6070.59%$980.00—$96.90$99.90340
33125$38.50$40.4070.65%$990.00—$103.70$106.70120

Forward $923.71. Not enough surviving quotes on both wings to measure the skew here.

2026-10-23(30 days)ATM 70.71%±187.64
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
021$95.20$107.00—$875.0071.08%$46.20$54.5090
013$92.50$102.80—$880.0071.20%$48.60$56.7020
04$89.80$101.40—$885.0070.77%$50.00$58.9010
04$87.40$98.10—$890.0071.04%$52.80$61.20120
010$84.80$94.80—$895.0071.10%$55.30$63.5060
247$81.90$92.70—$900.0071.06%$57.60$65.90395
29$79.40$89.30—$905.0070.86%$59.60$68.4072
015$77.00$87.10—$910.0070.77%$61.80$71.0010
211$74.60$84.80—$915.0070.86%$64.50$73.60120
118$72.30$82.00—$920.00—————
05$69.90$80.30—$925.0071.03%$69.90$79.1080
35$67.70$75.3069.77%$930.00—$72.30$81.9022
24$65.50$75.9071.12%$935.00—$74.80$84.7040
213$63.40$70.3069.52%$940.00—$77.60$87.6010
03$61.30$70.7070.72%$945.00—$81.20$90.60110
221$59.30$68.6070.73%$950.00—$83.70$93.6040
03$57.30$66.9070.89%$955.00—$86.90$96.60100
09$55.20$66.0071.33%$960.00—$87.00$99.6010
01$53.50$62.8070.82%$965.00—————
12$51.80$60.2070.55%$970.00—$96.00$105.90110
034$49.90$59.2070.90%$975.00—————

Forward $925.60. Not enough surviving quotes on both wings to measure the skew here.

2026-10-30(37 days)ATM 75.56%±222.65
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
21$107.70$120.90—$875.00—————
219$105.00$118.10—$880.0075.53%$61.10$69.40310
215$102.30$115.40—$885.0075.23%$62.80$71.7040
23$99.60$112.50—$890.0074.98%$64.60$74.1040
17$97.10$109.00—$895.0075.53%$68.10$76.7030
19$94.50$107.60—$900.0074.98%$69.40$79.10120
12$92.10$105.00—$905.0075.53%$73.00$81.8011
015$89.70$100.80—$910.0075.26%$74.80$84.50850
2038$88.00$98.40—$915.0075.38%$78.40$86.4031
110$85.10$97.30—$920.00—————
11$82.80$95.00—$925.00—————
01$80.60$91.6075.42%$930.00—$85.60$95.50110
02$78.40$89.1075.28%$935.00—————
1036$76.40$86.3075.07%$940.00—$88.50$101.10100
02$74.30$84.8075.33%$945.00—————
05$72.30$83.2075.55%$950.00—$94.20$107.0020
022$70.30$81.2075.57%$955.00—————
06$68.30$79.4075.63%$960.00—$100.40$113.0010
21$66.40$77.4075.62%$965.00—$104.80$116.1010
215$64.60$75.3075.57%$970.00—————
113$62.70$73.7075.66%$975.00—————

Forward $925.53. Not enough surviving quotes on both wings to measure the skew here.

2026-11-20(58 days)ATM 74.54%±275.96
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
076$154.50$165.20—$830.0074.34%$58.50$63.701620
075$148.80$158.50—$840.0074.50%$63.50$67.40562
0210$143.30$153.80—$850.0074.62%$67.60$72.201551
078$137.90$148.00—$860.0074.20%$72.10$75.50302
576$132.10$142.40—$870.0074.82%$76.50$82.00930
13286$129.00$137.10—$880.0074.74%$80.70$87.10710
011$122.70$131.60—$890.0074.34%$85.10$91.40631
8435$117.90$127.20—$900.0074.47%$90.00$97.001371
847$113.90$122.10—$910.0074.74%$95.80$102.40652
1435$107.80$117.70—$920.0074.74%$101.00$107.90382
6171$104.50$113.2074.81%$930.00—$106.70$113.40134
457$100.20$108.4074.63%$940.00—$111.60$119.30212
1134$96.20$103.3074.36%$950.00—$117.20$125.20170
0698$92.20$99.2074.34%$960.00—$123.10$131.30960
087$88.80$95.4074.53%$970.00—$129.10$136.20605
261$85.30$91.6074.60%$980.00—$135.20$143.80840
630$81.20$88.1074.48%$990.00—$141.50$150.30110
10186$77.80$84.9074.61%$1,000.00—$148.00$156.9080
460$74.50$81.3074.56%$1,010.00—$154.60$163.70110
143$71.40$78.2074.66%$1,020.00—$161.10$170.5080
035$68.30$74.7074.55%$1,030.00—$168.30$177.60220

Forward $928.79. Not enough surviving quotes on both wings to measure the skew here.

2026-12-18(86 days)ATM 71.53%±323.45
CallsStrikePuts
VolumeOpen intBidAskIV IVBidAskOpen intVolume
080$178.20$189.60—$820.0071.91%$70.30$75.201061
040$166.90$178.10—$840.0071.96%$79.00$84.001100
336$156.70$167.40—$860.0072.08%$88.80$93.00711
263$147.00$157.30—$880.0072.08%$98.50$102.80632
76315$137.70$146.90—$900.0072.52%$108.10$115.201421
331$133.30$141.60—$910.0072.47%$113.10$120.70250
387$129.00$137.80—$920.0072.45%$118.40$126.20160
249$124.80$133.30—$930.0072.21%$123.70$131.20210
244$120.70$129.5072.37%$940.00—$129.80$137.70120
4116$116.70$124.7072.20%$950.00—$135.00$143.60340
263$112.80$121.1072.34%$960.00—$140.70$149.10270
144$109.40$116.5072.27%$970.00—$146.90$155.60240
0187$105.30$112.8072.19%$980.00—$152.80$162.10322
132$101.70$106.7071.52%$990.00—$159.10$167.60200
2146$98.20$105.7072.25%$1,000.00—$165.50$173.901380
022$94.80$102.2072.25%$1,010.00—$172.60$180.8052
061$91.60$98.5072.18%$1,020.00—$178.60$188.50230
0113$88.20$96.1072.38%$1,030.00—$184.40$195.40100
054$85.30$92.2072.23%$1,040.00—$192.40$202.10160
245$82.40$88.8072.17%$1,050.00—$198.90$209.5050
028$79.50$86.5072.37%$1,060.00—$206.10$215.4020

Forward $931.62. 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.