WMT Options History — August 2008

In August 2008, WMT traded between $18.99 and $20.25. ATM implied volatility averaged 28.2%, placing in the 33.2% IV rank vs the trailing year. The 30-day expected move averaged 7.3%. IV traded below realized volatility by 4.8% (HV 20d: 33.1%). Max pain ranged from $18.33 to $19.17. Net GEX was positive for 21 of 21 trading days. Term structure was in contango for 16 of 21 days. Put/call ratio averaged 0.87.

Notable Days

  • 2008-08-12: Highest Volume — 629,853 contracts
  • 2008-08-14: Largest IV drop — 47.0% change
  • 2008-08-13: Highest IV Rank — 100.0%
  • 2008-08-01: Largest Expected Move — 8.8%

Monthly Statistics

MetricAvgMinMaxOpenClose
Price$19.59$18.99$20.25$19.25$19.69
Max Pain$18.37$18.33$19.17$19.17$18.33
ATM IV28.2%21.2%50.2%30.8%21.7%
Expected Move7.3%6.1%8.8%8.8%6.2%
HV 20d33.1%25.4%36.5%27.8%32.5%
HV 60d27.4%23.9%28.4%23.9%27.5%
IV Rank33.2%9.8%100.0%43.2%11.4%
IV Percentile60.3%11.1%100.0%90.5%14.3%
Term Structure0.9%-3.5%3.3%-3.5%1.9%
VWIV25.6%22.0%30.3%30.3%22.7%
Skew 25d5.2%4.6%6.4%4.8%5.4%
Skew 10d10.0%8.8%12.3%9.3%10.3%
Call IV 25d23.0%19.3%28.2%28.2%20.5%
Put IV 25d28.2%24.4%33.0%33.0%25.8%
Bid-Ask Spread %2.831.565.342.162.19
Gamma HHI0.160.130.220.140.18
Net GEX22.3M9.2M36.6M12.3M27.1M
Net DEX-1.42B-1.93B-923.2M-1.12B-1.50B
Net VEX-12.7M-13.3M-11.9M-13.3M-11.9M
Div Yield0.0%0.0%0.0%0.0%0.0%
P/C Ratio0.870.171.861.031.86
Total Volume145,684.85745,579629,85382,06545,579
Total OI4,182,9104,041,0724,346,0374,095,7474,215,423

Daily Data (21 trading days)

DatePriceMax PainATM IVExp MoveHV 20dIV RankVWIVSkew 25dTerm StrGEXDEXVEXP/CSpread %Call VolPut VolCall OIPut OI
2008-08-01$19.25$19.1730.8%8.8%27.8%43.2%30.3%4.8%-3.5%12.3M-1.12B-13.3M1.032.1640,41941,6461,915,6892,180,058
2008-08-04$19.48$18.3333.5%8.0%28.0%52.5%27.1%5.9%-0.1%16.9M-1.29B-13.2M0.563.6339,36322,2181,925,5832,186,262
2008-08-05$20.11$18.3329.7%7.4%27.1%39.6%26.5%6.4%0.1%26.9M-1.80B-12.7M0.572.5488,20050,6911,940,5622,184,546
2008-08-06$20.25$18.3329.6%7.3%25.4%39.3%25.5%5.5%0.6%29.2M-1.93B-12.7M0.592.2985,48550,0371,960,0232,197,188
2008-08-07$18.99$18.3330.2%8.0%34.7%41.5%28.0%4.8%-0.3%9.2M-923.2M-13.3M1.524.45114,921175,1341,977,2642,211,222
2008-08-08$19.29$18.3329.6%7.9%34.6%39.4%28.1%4.9%0.0%14.2M-1.13B-13.3M1.133.8356,09163,2221,997,9702,254,152
2008-08-11$19.52$18.3336.7%8.3%34.8%63.3%27.5%5.5%-0.9%20.7M-1.35B-13.1M0.573.63103,93558,7582,009,3162,250,375
2008-08-12$19.75$18.3339.2%7.8%35.0%71.9%28.8%5.7%0.4%24.9M-1.57B-13.0M0.173.15537,93691,9172,026,6262,259,063
2008-08-13$19.29$18.3350.2%8.5%35.9%100.0%29.6%5.0%-0.2%14.0M-1.17B-13.3M1.225.34139,248169,2692,000,8262,285,457
2008-08-14$19.37$18.3326.6%7.6%35.7%26.7%25.9%4.6%1.6%16.2M-1.23B-12.8M0.314.53188,82058,3922,002,9412,316,990
2008-08-15$19.79$18.3323.5%6.7%36.5%17.1%24.2%5.1%3.3%36.6M-1.66B-12.6M0.833.8489,72474,3492,043,9482,302,089
2008-08-18$19.61$18.3323.7%6.8%36.4%17.5%24.4%5.1%1.6%20.7M-1.44B-12.5M0.642.3355,66235,8921,885,5722,155,500
2008-08-19$19.40$18.3325.8%7.4%35.0%24.2%25.0%5.2%1.2%18.4M-1.27B-12.7M1.022.5340,19741,0971,913,5112,170,698
2008-08-20$19.45$18.3325.1%7.2%34.5%22.0%24.2%4.8%1.4%20.7M-1.32B-12.5M0.881.7031,56927,7051,922,3342,173,290
2008-08-21$19.50$18.3325.2%7.2%33.7%22.3%24.1%5.1%1.4%21.8M-1.36B-12.6M0.631.5847,58330,1891,933,1942,178,219
2008-08-22$19.81$18.3321.2%6.1%34.1%9.8%22.4%5.1%3.0%28.4M-1.58B-12.2M1.031.8347,10648,6331,937,0822,184,324
2008-08-25$19.52$18.3324.8%7.1%34.1%20.9%23.9%5.1%1.3%23.1M-1.36B-12.2M1.062.1833,23435,2561,953,2162,207,679
2008-08-26$19.67$18.3322.2%6.4%33.1%12.9%23.8%5.1%2.1%25.9M-1.48B-12.1M0.701.9432,34622,5391,959,6512,220,885
2008-08-27$19.76$18.3321.8%6.3%32.5%11.8%23.8%5.5%2.4%27.7M-1.54B-12.0M1.222.2533,16840,5061,966,1222,228,181
2008-08-28$19.96$18.3321.4%6.1%32.6%10.4%22.0%5.1%2.0%32.5M-1.70B-12.0M0.791.5639,88231,4641,976,0342,232,045
2008-08-29$19.69$18.3321.7%6.2%32.5%11.4%22.7%5.4%1.9%27.1M-1.50B-11.9M1.862.1915,90929,6701,977,1382,238,285