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wjm2
Posted : Thursday, September 2, 2010 9:46:12 AM
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Joined: 6/15/2005
Posts: 27
Any idea why Worden shows such a stunning volume spike in the SP500 yesterday when all other sources I've checked show rather flat to slightly down volume?  Investors Business Daily, BigCharts, Yahoo, etc.

Is Worden right and the rest of the world wrong on this, or will you change the data?

Thanks.

Bill
Bruce_L
Posted : Thursday, September 2, 2010 9:51:47 AM


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Joined: 10/7/2004
Posts: 65,138
We don't report actual volume for the Standard & Poor’s 500 (SP-500).

The indexes in TeleChart are published without volume with a few exceptions. Total volume is reported for the NYSE Composite (NYSE), AMEX Composite (XAX) and the NASDAQ Composite (COMPQX). The following indexes are also reported with volumes, but the volume figures come from one of the three composite indexes above. We report them this way so you’ll have a reference to the overall market volume when using these indexes.

Dow Jones Industrial Average (DJ-30) - DJ-30 volume
Standard & Poor’s 500 (SP-500) - NYSE volume
Standard & Poor’s 100 (OEX) - NYSE volume
NASDAQ 100 Index - COMPQX volume

All regular symbols in the program are truncated to the 100’s place and therefore would need to have two zeros added. For the following symbols, five zeros need to be added:

SP-500
OEX
DJX--X
NYSE
NDX--X
COMPQX
MNX—X

-Bruce
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wjm2
Posted : Thursday, September 2, 2010 10:09:04 AM
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Posts: 27
Dow Jones Industrial Average (DJ-30) - DJ-30 volume
Standard & Poor’s 500 (SP-500) - NYSE volume
Standard & Poor’s 100 (OEX) - NYSE volume
NASDAQ 100 Index - COMPQX volume

I understand, and in fact when I saw such a screwy volume spike the first thing I did was to check the NYSE composite volume in the WSJ web site.  They show volume was slightly down yesterday, not up 4x the previous day.  Yahoo shows the volume up slightly.

Worden shows NYSE volume up sharply yesterday which is consistent.

So I'm still confused why your numbers are so far off from others.  You'll also notice that none of your volumes for the other averages show a 4x volume spike which should say something is wrong.  You can't really expect to have NYSE volume up 4x and the DJIA down for example.

Bill
Bruce_L
Posted : Thursday, September 2, 2010 1:10:44 PM


Worden Trainer

Joined: 10/7/2004
Posts: 65,138
We use the NYSE Issues Volume Total, not the NYSE Composite Volume. The Value we are reporting is consistent with other sources, but we are looking into it as it does seem high.

-Bruce
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Bruce_L
Posted : Thursday, September 2, 2010 1:27:04 PM


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Posts: 65,138
The Volume was in fact higher than it should be and is being corrected.

-Bruce
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wjm2
Posted : Thursday, September 2, 2010 5:14:44 PM
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Joined: 6/15/2005
Posts: 27
Thanks for the follow up Bruce.

And you'll notice that your SP500 volume now exactly matches your NYSE Composite volume.  i.e. Composite volume is the same as Total volume.  Which is not surprising since the NYSE Composite is just a sum total of all stocks on the exchange, weighted by shares outstanding, and normalized to a value of 5000 back in 2003.

Bill
Bruce_L
Posted : Friday, September 3, 2010 7:47:00 AM


Worden Trainer

Joined: 10/7/2004
Posts: 65,138
I'm not in the data department and am not an expert on the issues involved. This is one of the reasons (in addition to forums not being manned 24/7) why reporting issues in the forums is not as efficient as reporting an issue directly in StockFinder or sending an email.

While it is not intuitive (certainly not to me anyway), they did tell me NYSE Issues Volume Total and NYSE Composite Volume are not the same thing and NYSE Composite Volume quotes would not necessarily match or help with tracking the NYSE Issues Volume Total.

-Bruce
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