Alright XEO and SPX you proved your point, now chill the F@#$ out already....jeez

Quote from momoneythansens:
lol. Could be the arbs jumping on the rally to balance their books for the month. Classic signs of large buy programs. It just ain't stoppin'. Right up to the bell.
Momoney.
Quote from optioncoach:
Wow... maybe it is easier to ask you which strikes are you NOT short lol. I assume that you will be BANK in Oct then...? lol
Quote from IV_Trader:
I think you should attach the historical Vols # across every line. I am pretty sure you will get same risk/reword then .
Choad,Quote from Choad:
Here it is!
For data miners and SPX traders, here are the Expiration-to-Expiration percentage changes for SP500 for the last 10 years. Note that if you were trying to stay out of trouble with your OTM spreads, you would be scrambling like crazy and subject to huge whipsaws during some of those months. Good luck!
[ ... ]

Here is the data back to '86 with the lowest and highest % moves from the previous month:Quote from dottom:
Choad,
Do you have numbers for max % move up or down intra-month? A large intramonth could force IC strats to adjust...
PART ONE
Expiration to expiration changes (at Close) for SP-500
Start 19860117 Price: 208.43
Date: 19860221 Price: 224.62 %Change: [b][color=red]7.77[/color][/b] %Change LOWEST: -2.37 %Change HIGHEST: 7.77
Date: 19860321 Price: 233.34 %Change: 3.88 %Change LOWEST: -0.37 %Change HIGHEST: 5.31
Date: 19860418 Price: 242.38 %Change: 3.87 %Change LOWEST: -2.02 %Change HIGHEST: 4.15
Date: 19860516 Price: 232.76 %Change: -3.97 %Change LOWEST: -3.97 %Change HIGHEST: 0.97
Date: 19860620 Price: 247.58 %Change: [b][color=red]6.37[/color][/b] %Change LOWEST: 0.19 %Change HIGHEST: 6.38
Date: 19860718 Price: 236.36 %Change: -4.53 %Change LOWEST: -5.62 %Change HIGHEST: 2.07
Date: 19860815 Price: 247.15 %Change: 4.57 %Change LOWEST: -0.77 %Change HIGHEST: 4.57
Date: 19860919 Price: 232.21 %Change: [b][color=red]-6.04[/color][/b] %Change LOWEST: -6.67 %Change HIGHEST: 2.70
Date: 19861017 Price: 238.84 %Change: 2.86 %Change LOWEST: -0.99 %Change HIGHEST: 3.15
Date: 19861121 Price: 245.86 %Change: 2.94 %Change LOWEST: -1.24 %Change HIGHEST: 3.45
Date: 19861219 Price: 249.73 %Change: 1.57 %Change LOWEST: 0.37 %Change HIGHEST: 3.31
Date: 19870116 Price: 266.28 %Change: [b][color=red]6.63[/color][/b] %Change LOWEST: -3.03 %Change HIGHEST: 6.63
Date: 19870220 Price: 285.48 %Change: [b][color=red]7.21[/color][/b] %Change LOWEST: 0.59 %Change HIGHEST: 7.24
Date: 19870320 Price: 298.17 %Change: 4.45 %Change LOWEST: -1.09 %Change HIGHEST: 4.45
Date: 19870416 Price: 286.91 %Change: -3.78 %Change LOWEST: -6.38 %Change HIGHEST: 1.27
Date: 19870515 Price: 287.43 %Change: 0.18 %Change LOWEST: -1.88 %Change HIGHEST: 2.98
Date: 19870619 Price: 306.97 %Change: [b][color=red]6.80[/color][/b] %Change LOWEST: -3.21 %Change HIGHEST: 6.80
Date: 19870717 Price: 314.59 %Change: 2.48 %Change LOWEST: -0.97 %Change HIGHEST: 2.48
Date: 19870821 Price: 335.90 %Change: [b][color=red]6.77[/color][/b] %Change LOWEST: -2.16 %Change HIGHEST: 6.77
Date: 19870918 Price: 314.86 %Change: [b][color=red]-6.26[/color][/b] %Change LOWEST: -6.65 %Change HIGHEST: 0.26
Date: 19871016 Price: 282.70 %Change: [b][color=red]-10.21[/color][/b] %Change LOWEST: -10.21 %Change HIGHEST: 4.20
Date: 19871120 Price: 242.00 %Change: [b][color=red]-14.40[/color][/b] %Change LOWEST: -20.47 %Change HIGHEST: -8.60
Date: 19871218 Price: 249.16 %Change: 2.96 %Change LOWEST: -7.47 %Change HIGHEST: 2.96
Date: 19880115 Price: 252.05 %Change: 1.16 %Change LOWEST: -2.31 %Change HIGHEST: 4.78
Date: 19880219 Price: 261.61 %Change: 3.79 %Change LOWEST: -3.74 %Change HIGHEST: 3.79
Date: 19880318 Price: 271.12 %Change: 3.64 %Change LOWEST: -0.01 %Change HIGHEST: 3.67
Date: 19880415 Price: 259.77 %Change: -4.19 %Change LOWEST: -5.54 %Change HIGHEST: 0.16
Date: 19880520 Price: 253.02 %Change: -2.60 %Change LOWEST: -3.24 %Change HIGHEST: 1.60
Date: 19880617 Price: 270.68 %Change: [b][color=red]6.98[/color][/b] %Change LOWEST: -0.87 %Change HIGHEST: 8.47
Date: 19880715 Price: 272.05 %Change: 0.51 %Change LOWEST: -1.08 %Change HIGHEST: 1.89
Date: 19880819 Price: 260.24 %Change: -4.34 %Change LOWEST: -4.91 %Change HIGHEST: 0.34
Date: 19880916 Price: 270.65 %Change: 4.00 %Change LOWEST: -1.25 %Change HIGHEST: 4.00
Date: 19881021 Price: 283.66 %Change: 4.81 %Change LOWEST: -0.88 %Change HIGHEST: 4.81
Date: 19881118 Price: 266.47 %Change: [b][color=red]-6.06[/color][/b] %Change LOWEST: -6.99 %Change HIGHEST: -0.45
Date: 19881216 Price: 276.29 %Change: 3.69 %Change LOWEST: -0.09 %Change HIGHEST: 4.38
Date: 19890120 Price: 286.63 %Change: 3.74 %Change LOWEST: -0.35 %Change HIGHEST: 3.84
Date: 19890217 Price: 296.76 %Change: 3.53 %Change LOWEST: -0.74 %Change HIGHEST: 4.54
Date: 19890317 Price: 292.69 %Change: -1.37 %Change LOWEST: -3.25 %Change HIGHEST: 0.90
Date: 19890421 Price: 309.61 %Change: [b][color=red]5.78[/color][/b] %Change LOWEST: -1.27 %Change HIGHEST: 5.78
Date: 19890519 Price: 321.24 %Change: 3.76 %Change LOWEST: -1.43 %Change HIGHEST: 3.76
Date: 19890616 Price: 321.35 %Change: 0.03 %Change LOWEST: -0.91 %Change HIGHEST: 1.78
Date: 19890721 Price: 335.90 %Change: 4.53 %Change LOWEST: -1.05 %Change HIGHEST: 4.53
Date: 19890818 Price: 346.03 %Change: 3.02 %Change LOWEST: -0.66 %Change HIGHEST: 4.02
Date: 19890915 Price: 345.06 %Change: -0.28 %Change LOWEST: -1.55 %Change HIGHEST: 2.23
Date: 19891020 Price: 347.16 %Change: 0.61 %Change LOWEST: -3.31 %Change HIGHEST: 4.27
Date: 19891117 Price: 341.61 %Change: -1.60 %Change LOWEST: -4.19 %Change HIGHEST: -0.67
Date: 19891215 Price: 350.14 %Change: 2.50 %Change LOWEST: -0.66 %Change HIGHEST: 3.26