CALX Options History — September 2025

In September 2025, CALX traded between $58.54 and $63.87. ATM implied volatility averaged 33.3%, placing in the 16.6% IV rank vs the trailing year. The 30-day expected move averaged 9.5%. IV traded above realized volatility by 6.4% (HV 20d: 26.9%). Max pain ranged from $42.50 to $52.50. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 19 of 21 days. Put/call ratio averaged 0.92.

Notable Days

  • 2025-09-10: Highest Volume — 401 contracts
  • 2025-09-09: Largest IV spike — 44.6% change
  • 2025-09-09: Highest IV Rank — 23.9%
  • 2025-09-24: Largest Expected Move — 10.7%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$61.62$58.54$63.87$59.05$61.19
Max Pain$45.36$42.50$52.50$52.50$45.00
ATM IV33.3%26.7%38.6%32.4%36.5%
Expected Move9.5%8.9%10.7%9.3%10.5%
HV 20d26.9%24.6%28.6%26.5%26.1%
HV 60d26.4%25.5%27.1%25.5%25.8%
IV Rank16.6%7.7%23.9%15.4%20.9%
IV Percentile23.9%3.6%42.9%17.5%38.5%
Term Structure8.0%-4.8%14.0%0.9%5.0%
VWIV31.0%18.2%36.6%32.4%19.7%
Skew 25d4.8%-11.9%16.4%3.5%16.4%
Skew 10d3.7%-9.0%17.7%15.7%7.9%
Call IV 25d27.9%17.5%36.5%31.3%21.9%
Put IV 25d32.6%20.9%38.8%34.8%38.3%
Bid-Ask Spread %87.9079.1999.1084.6279.31
Gamma HHI0.290.190.400.330.19
Net GEX175.1K132.9K234.1K173.1K132.9K
Net DEX-7.3M-8.9M-6.1M-6.3M-6.3M
Net VEX-11.8K-12.8K-10.7K-12.4K-11.3K
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.920.008.000.500.00
Total Volume72.619140130116
Total OI3,158.9522,8253,4282,8253,293

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2025-09-02$59.05$52.5032.4%9.3%26.5%15.4%32.4%3.5%0.9%173.1K-6.3M-12.4K0.5084.6220101,6251,200
2025-09-03$58.54$52.5033.0%9.5%25.8%16.2%32.4%2.8%-4.8%177.6K-6.1M-12.8K0.0590.172011,6341,203
2025-09-04$60.69$42.5032.5%9.0%28.5%15.5%31.3%-1.6%9.2%177.1K-7.1M-11.5K0.0089.141601,6341,202
2025-09-05$60.62$42.5032.4%9.6%28.4%15.4%33.4%-3.0%7.4%178.8K-7.1M-11.6K4.4091.075221,6351,202
2025-09-08$61.22$42.5026.7%8.9%28.4%7.7%30.2%-11.9%10.0%176.1K-7.4M-10.7K1.8088.4810181,6361,218
2025-09-09$61.45$45.0038.6%9.4%28.4%23.9%32.0%7.4%8.2%163.9K-7.3M-10.9K0.1188.163841,6371,235
2025-09-10$62.80$45.0032.6%9.3%27.2%15.6%32.6%8.7%8.9%156.6K-8.1M-10.9K0.0879.19372291,6691,235
2025-09-11$63.43$45.0031.3%9.0%27.3%13.8%30.9%5.6%10.4%192.8K-8.6M-11.9K0.7479.5738281,9651,260
2025-09-12$61.73$45.0031.9%9.1%25.7%14.7%29.8%4.9%10.4%208.5K-7.9M-12.1K0.1485.76133191,9861,285
2025-09-15$61.67$45.0034.3%9.8%25.8%18.0%30.3%7.2%7.3%234.1K-7.9M-12.2K0.0085.5910402,1171,294
2025-09-16$61.38$45.0035.0%10.0%25.8%18.9%34.8%1.8%3.1%203.2K-7.4M-11.9K0.0084.331402,0621,294
2025-09-17$61.59$45.0031.7%9.1%24.6%14.4%18.2%12.3%12.3%194.1K-7.7M-11.4K0.0097.2620002,0621,294
2025-09-18$63.87$45.0031.2%8.9%26.5%13.7%36.6%14.5%12.3%193.0K-8.9M-12.1K0.6383.9535222,1311,294
2025-09-19$63.35$45.0033.2%9.5%26.6%16.5%31.6%15.1%9.3%192.7K-8.6M-11.8K0.0785.6812492,1371,291
2025-09-22$63.23$45.0034.1%9.8%26.0%17.7%33.6%13.8%10.8%171.7K-7.3M-12.4K2.1087.9610211,9731,251
2025-09-23$62.97$45.0031.6%9.1%26.1%14.3%31.8%1.9%13.7%164.1K-7.2M-12.0K0.2986.9934101,9771,271
2025-09-24$61.13$45.0037.5%10.7%28.6%22.2%0.0%5.6%-1.5%147.9K-6.6M-12.2K8.0091.33181,9941,281
2025-09-25$61.33$45.0036.4%10.4%28.6%20.8%35.8%-4.2%7.9%146.4K-6.5M-12.4K0.0089.59501,9951,289
2025-09-26$61.64$45.0033.6%9.6%27.4%17.0%0.0%-5.2%12.4%143.7K-6.6M-11.6K0.3398.642171,9961,289
2025-09-29$61.16$45.0033.1%9.5%26.4%16.3%0.0%4.1%14.0%148.3K-6.7M-11.8K0.0099.10101,9961,296
2025-09-30$61.19$45.0036.5%10.5%26.1%20.9%19.7%16.4%5.0%132.9K-6.3M-11.3K0.0079.3111601,9971,296