SPY Options History — October 2018

In October 2018, SPY traded between $260.88 and $291.63. ATM implied volatility averaged 15.9%, placing in the 45.4% IV rank vs the trailing year. The 30-day expected move averaged 4.8%. IV traded above realized volatility by 3.0% (HV 20d: 13.0%). Max pain ranged from $280.00 to $290.00. Net GEX was positive for 3 of 23 trading days. Term structure was in contango for 8 of 23 days. Put/call ratio averaged 1.65.

Notable Days

  • 2018-10-11: Highest Volume — 6,910,917 contracts
  • 2018-10-10: Largest IV spike — 37.5% change
  • 2018-10-29: Highest IV Rank — 81.1%
  • 2018-10-29: Largest Expected Move — 7.8%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$278.19$260.88$291.63$291.16$271.73
Max Pain$285.96$280.00$290.00$290.00$280.00
ATM IV15.9%8.8%23.3%9.0%18.4%
Expected Move4.8%2.4%7.8%2.5%5.9%
HV 20d13.0%5.7%21.9%5.8%21.9%
HV 60d9.8%6.8%13.9%7.0%13.9%
IV Rank45.4%11.4%81.1%12.5%57.1%
IV Percentile82.8%35.3%99.2%42.9%93.3%
Term Structure-0.1%-0.8%1.2%0.3%-0.5%
VWIV17.9%9.3%27.0%9.7%22.9%
Skew 25d6.4%3.6%8.4%3.7%6.0%
Skew 10d12.8%6.7%16.1%6.8%11.6%
Call IV 25d13.2%7.4%19.7%7.5%15.5%
Put IV 25d19.6%11.2%27.6%11.2%21.5%
Bid-Ask Spread %1.801.242.671.241.66
Gamma HHI0.040.030.050.030.03
Net GEX-7.01B-12.32B2.18B1.91B-3.54B
Net DEX54.90B-26.30B126.58B-22.85B48.71B
Net VEX-501.1M-527.1M-454.5M-455.1M-517.3M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio1.651.421.971.481.60
Total Volume3,862,202.131,711,2146,910,9172,043,5284,027,918
Total OI22,775,079.17419,082,04626,042,30819,082,04624,945,739

Daily Data (23 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call WallPut WallCall VolPut VolCall OIPut OI
2018-10-01$291.16$290.009.0%2.5%5.8%12.5%9.7%3.7%0.3%1.91B-22.85B-455.1M1.481.24N/AN/A823,9251,219,6037,376,92811,705,118
2018-10-02$291.56$290.008.8%2.4%5.8%11.4%9.4%4.1%0.1%2.18B-25.88B-454.5M1.531.25N/AN/A675,6091,035,6057,493,20311,934,891
2018-10-03$291.63$290.009.0%2.5%5.7%12.4%9.3%3.6%-0.1%572.1M-26.30B-456.4M1.611.26N/AN/A981,0911,576,7427,716,93412,254,444
2018-10-04$288.81$290.0010.9%3.4%6.7%21.8%13.1%5.1%-0.3%-6.00B7.80B-497.7M1.711.71N/AN/A1,449,7602,479,3547,798,14012,687,392
2018-10-05$287.61$290.0011.9%3.7%6.8%26.4%14.5%6.1%-0.1%-9.89B23.67B-509.2M1.801.44N/AN/A1,319,5562,372,3228,221,56213,286,247
2018-10-08$288.08$290.0011.7%3.6%6.8%24.7%14.8%6.5%1.2%-6.26B12.30B-497.5M1.611.47N/AN/A1,229,7941,983,3778,101,93713,143,204
2018-10-09$287.52$290.0012.8%3.6%6.7%30.4%14.2%6.4%0.5%-7.01B14.30B-498.8M1.471.46N/AN/A972,3051,431,0298,197,60213,524,572
2018-10-10$279.22$290.0017.7%5.0%12.2%53.8%17.7%7.9%-0.2%-12.32B91.37B-519.5M1.922.45N/AN/A2,027,1753,895,7428,474,23613,888,273
2018-10-11$273.86$289.0020.9%5.8%13.5%69.6%20.1%8.4%-0.8%-11.39B115.33B-517.9M1.812.67N/AN/A2,459,5494,451,3688,840,82013,882,211
2018-10-12$275.67$288.0018.5%5.2%13.9%57.7%19.4%7.8%-0.1%-11.57B99.06B-527.1M1.622.31N/AN/A2,104,1013,409,6199,739,91614,460,987
2018-10-15$275.78$287.0016.9%4.8%13.9%50.2%17.9%7.6%-0.0%-10.53B86.49B-501.1M1.481.75N/AN/A1,365,4722,026,01710,055,27214,169,999
2018-10-16$280.27$286.0014.7%4.2%15.0%39.2%16.3%6.1%0.1%-6.67B39.01B-504.9M1.661.52N/AN/A1,284,6382,133,80210,186,78414,297,259
2018-10-17$279.95$285.0014.7%4.2%15.0%39.4%16.0%5.7%-0.4%-7.71B41.99B-510.1M1.631.61N/AN/A1,462,0092,377,06910,386,42314,815,120
2018-10-18$276.61$285.0016.5%4.8%14.9%48.0%18.5%6.8%-0.5%-10.54B73.72B-513.3M1.971.83N/AN/A1,476,3022,913,29910,526,17514,682,891
2018-10-19$276.68$285.0016.1%4.7%14.9%46.2%17.4%7.0%0.1%-8.83B68.95B-516.4M1.641.73N/AN/A1,519,6302,497,01210,977,76615,064,542
2018-10-22$275.60$284.0016.2%4.8%14.9%46.7%17.9%6.7%-0.3%-6.87B57.40B-504.2M1.501.61N/AN/A1,055,2641,583,9379,084,57612,333,219
2018-10-23$274.02$284.0017.3%5.2%14.9%52.0%19.8%6.8%-0.4%-6.91B64.88B-506.4M1.811.97N/AN/A1,550,4062,800,6319,187,89812,484,866
2018-10-24$268.63$283.0019.5%6.0%16.0%62.6%21.6%7.2%-0.5%-8.41B97.13B-489.0M1.582.17N/AN/A1,464,4542,308,1969,625,76312,915,747
2018-10-25$270.85$281.0019.0%6.0%16.6%60.3%22.6%6.6%-0.6%-6.76B73.20B-521.7M1.691.97N/AN/A1,500,3522,539,4969,836,73413,143,319
2018-10-26$265.25$280.0021.7%7.0%17.6%73.4%26.6%7.5%-0.1%-9.03B111.34B-508.2M1.932.17N/AN/A1,970,9873,808,08110,292,05513,850,966
2018-10-29$260.88$280.0023.3%7.8%17.9%81.1%27.0%7.9%0.0%-8.69B126.58B-489.3M1.432.26N/AN/A1,613,9112,310,31210,119,15413,953,524
2018-10-30$267.08$280.0020.6%6.8%20.6%68.0%25.3%6.6%0.0%-6.89B84.59B-509.8M1.421.99N/AN/A1,383,9921,959,83610,269,46513,892,948
2018-10-31$271.73$280.0018.4%5.9%21.9%57.1%22.9%6.0%-0.5%-3.54B48.71B-517.3M1.601.66N/AN/A1,551,3382,476,58010,690,34414,255,395