SPX Options History — October 2015

In October 2015, SPX traded between $1907.14 and $2089.44. ATM implied volatility averaged 14.5%, placing in the 42.4% IV rank vs the trailing year. The 30-day expected move averaged 4.2%. IV traded below realized volatility by 3.3% (HV 20d: 17.8%). Max pain ranged from $1950.00 to $2000.00. Net GEX was positive for 20 of 22 trading days. Term structure was in contango for 15 of 22 days. Put/call ratio averaged 1.76.

Notable Days

  • 2015-10-23: Highest Volume — 1,790,085 contracts
  • 2015-10-02: Largest IV drop — 11.9% change
  • 2015-10-01: Highest IV Rank — 68.0%
  • 2015-10-01: Largest Expected Move — 6.4%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$2023.08$1907.14$2089.44$1907.14$2083.92
Max Pain$1984.55$1950.00$2000.00$1975.00$2000.00
ATM IV14.5%11.9%21.7%21.7%12.0%
Expected Move4.2%3.4%6.4%6.4%3.6%
HV 20d17.8%12.4%21.0%19.2%12.4%
HV 60d20.6%19.8%20.9%19.8%20.9%
IV Rank42.4%20.6%68.0%68.0%20.6%
IV Percentile63.3%36.5%94.4%94.4%40.1%
Term Structure0.0%-0.3%0.8%-0.3%0.8%
VWIV16.1%12.9%22.9%22.9%14.0%
Skew 25d5.3%4.4%6.9%6.9%4.6%
Skew 10d9.8%8.5%12.7%12.7%8.7%
Call IV 25d12.3%10.1%18.3%18.3%10.3%
Put IV 25d17.6%14.6%25.2%25.2%14.9%
Bid-Ask Spread %30.6723.5250.4133.6231.91
Gamma HHI0.030.030.060.030.04
Net GEX10.74B-18.44B29.36B-18.44B21.74B
Net DEX-116.17B-321.41B250.48B250.48B-300.34B
Net VEX-2.04B-2.13B-1.98B-2.02B-2.13B
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio1.761.352.111.562.04
Total Volume1,201,994.727858,3491,790,085858,3491,317,118
Total OI13,279,141.512,145,29814,480,98513,001,48314,075,961

Daily Data (22 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2015-10-01$1907.14$1975.0021.7%6.4%19.2%68.0%22.9%6.9%-0.3%-18.44B250.48B-2.02B1.5633.62334,778523,5714,430,2458,571,238
2015-10-02$1947.06$1975.0019.1%5.5%20.6%59.3%20.3%5.7%-0.1%-8.19B121.80B-2.07B2.0150.41468,611943,5194,533,3158,819,743
2015-10-05$1983.95$1950.0017.2%4.9%21.0%52.8%18.4%5.9%0.0%914.3M-3.40B-2.04B1.5631.15442,035690,8894,359,4398,349,465
2015-10-06$1980.42$1950.0017.0%4.9%19.9%52.2%19.3%6.0%0.1%1.03B5.76B-2.04B2.0629.47411,128846,3884,484,1978,524,242
2015-10-07$1992.85$1960.0016.2%4.7%19.2%49.5%18.1%5.6%0.1%5.00B-36.93B-2.04B2.1124.09397,992840,4974,569,2478,691,232
2015-10-08$2012.20$1970.0015.3%4.4%19.3%46.6%17.3%5.4%0.1%13.22B-112.76B-2.06B1.6524.79498,900821,4424,659,6008,892,352
2015-10-09$2012.94$1975.0014.8%4.3%19.3%44.7%16.2%5.3%0.2%13.03B-111.80B-2.06B1.5031.56522,591781,8874,748,3129,130,643
2015-10-12$2015.82$1975.0014.0%4.1%19.2%42.2%16.6%5.2%0.1%10.50B-103.68B-2.00B1.9730.20301,678594,5524,610,0238,600,873
2015-10-13$2003.84$1975.0015.0%4.3%18.7%45.4%15.3%5.8%0.0%4.50B-51.83B-2.03B1.7431.41374,403652,8414,651,3668,761,977
2015-10-14$1993.00$1985.0015.4%4.4%18.6%46.7%17.1%5.4%0.1%1.51B-10.37B-2.04B1.9032.41405,000769,9734,743,9008,991,313
2015-10-15$2023.79$1990.0013.7%3.9%19.4%41.1%16.7%5.4%0.1%13.16B-140.06B-2.03B1.9430.05436,651847,8664,844,3779,246,015
2015-10-16$2032.36$1995.0013.0%3.8%18.4%38.7%14.8%5.1%0.2%17.06B-171.73B-2.02B1.8323.52488,852893,2474,917,8919,563,094
2015-10-19$2031.79$1995.0012.6%3.6%18.4%37.4%14.2%5.1%0.0%11.88B-119.91B-1.98B1.9226.14337,106648,4594,222,8907,922,408
2015-10-20$2027.82$1995.0013.3%3.8%17.0%39.5%14.7%4.9%0.0%10.08B-109.79B-2.04B1.7030.95326,943554,4294,322,1008,080,283
2015-10-21$2017.55$1995.0014.1%4.0%17.2%42.3%16.1%5.2%0.0%5.74B-69.41B-2.06B2.0927.59383,581799,9514,424,3258,253,443
2015-10-22$2050.88$2000.0012.7%3.6%17.7%37.7%13.6%4.8%-0.0%23.00B-202.49B-2.03B1.4630.54594,330868,1374,508,5978,542,079
2015-10-23$2075.44$2000.0011.9%3.4%18.0%35.0%13.5%4.4%0.1%29.36B-299.17B-2.01B1.3533.81760,9031,029,1824,583,0398,741,423
2015-10-26$2071.43$2000.0012.9%3.7%14.8%38.3%13.8%5.1%-0.1%17.67B-238.56B-2.06B1.7132.11329,182563,0014,471,4518,367,326
2015-10-27$2065.50$2000.0013.2%3.9%14.9%39.4%15.3%5.0%-0.2%15.76B-214.89B-2.08B1.8231.17351,014638,4204,542,0788,488,419
2015-10-28$2088.61$2000.0011.9%3.5%14.1%33.3%12.9%4.7%-0.1%23.21B-315.32B-2.03B1.4630.45477,122695,9834,629,8218,671,677
2015-10-29$2089.44$2000.0012.1%3.6%13.6%20.9%13.6%4.7%-0.2%24.59B-321.41B-2.06B1.3527.32628,714851,0184,725,4858,874,209
2015-10-30$2083.92$2000.0012.0%3.6%12.4%20.6%14.0%4.6%0.8%21.74B-300.34B-2.13B2.0431.91433,960883,1584,929,1269,146,835