> Is there data that shows that the coin toss at the end is biased against you?
It depends on your postion at the end... check out the below and make your own decision.
Here is some data from the last 12 years on how the Settlement value compares to the Cash value for the SPX, RUT, NDX.
This table shows that over 60% of the time for the RUT and SPX the AVERAGE Settlement value is above the value of the Cash Open on Expiry day by about a point.
BUT... because the average consists of a bunch of positive numbers and a bunch of negative numbers which cancel each other out, it is more relevant to look at the Average Absolute difference.
This says that the absolute value of the settlement from the open is almost 7 points for the SPX and about 3 points for the RUT. That's pretty significant in my book!
SETTLEMENT VALUE RELATIVE TO CASH VALUE | ||||
SPX | RUT | NDX | ||
| | Open | Open | Open |
AVE DIFFERENCE | Pts | 1.17 | 1.09 | 1.77 |
MEDIAN DIFFERENCE | Pts | 1.41 | 0.75 | 0.87 |
AVE ABSOLUTE DIFFERENCE | Pts | 6.79 | 2.82 | 6.77 |
% TIME ABOVE CASH | 63.2% | 65.3% | 55.6% | |
WHEN ABOVE, Ave AMOUNT | Pts | 6.3 | 3.0 | 7.7 |
WHEN BELOW, Ave AMOUNT | Pts | -7.6 | -2.5 | -5.6 |
STD DEV of DIFFERENCE | Pts | 10.7 | 4.3 | 12.9 |
MAX DIFFERENCE ABOVE CASH | Pts | 66.2 | 27.7 | 67.2 |
MAX DIFFERENCE BELOW CASH | Pts | -45.0 | -12.2 | -62.7 |
AVE + 1 STD DEV DIFFERENCE | Pts | 11.9 | 5.4 | 14.7 |
Of more relevance is how much the Settlement value varies from varies from the close on the last trading day (the day before) since this is your last chance to exit.
SETTLEMENT VALUE RELATIVE TO CASH VALUE | ||||
PREVIOUS DAY'S CLOSE | ||||
I.e. How much does settlement change from prev day's close | ||||
SPX | RUT | NDX | ||
AVE DIFFERENCE | Pts | 1.12 | 1.63 | 0.56 |
MEDIAN DIFFERENCE | Pts | 1.46 | 0.90 | 2.93 |
AVE ABSOLUTE DIFFERENCE | Pts | 7.23 | 3.72 | 16.57 |
% TIME ABOVE CASH | 62.5% | 64.6% | 60.4% | |
WHEN ABOVE, Ave AMOUNT | Pts | 6.7 | 4.1 | 14.2 |
WHEN BELOW, Ave AMOUNT | Pts | -8.2 | -3.0 | -20.2 |
STD DEV of DIFFERENCE | Pts | 11.5 | 6.6 | 26.1 |
MAX DIFFERENCE ABOVE CASH | Pts | 72.8 | 47.7 | 97.6 |
MAX DIFFERENCE BELOW CASH | Pts | -45.0 | -18.6 | -143.2 |
AVE + 1 STD DEV DIFFERENCE | Pts | 12.6 | 8.2 | 26.7 |
This table shows the numbers get a bit larger, particularly for the NDX. There is usually a significant change from the Thursday close to the Expiry on the open the next day. Usually it is a bit higher than the Thrusday close, but there are nasty down surprises as well.
In both cases, note the max differences!!
Bottom line to me is you need to close your positions the day before expiry, or run the risk of a surprise.
----- Original Message -----
From: "Ricky Jimenez" <rickyjim@bestweb.net >
Sent: Thursday, March 25, 2010 6:55 AM
Subject: Re: [TheOptionClub.com] Re: Index Settlement Values
wrote:
>Ricky--
>
>
>On each of the days prior to expiry you actually have the option to either close or not the position-all depending on the actual cash and market. However, on expiry you have no choice and you are at the absolute mercy of the settlement print. So the hassle might very well worth it!
>
>
Is there data that shows that the coin toss at the end is biased
against you?
------------
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