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This is what Yahoo has to say about their data sources.
Fundamental company data provided by Capital IQ. Quotes and other
information supplied by independent providers identified on the Yahoo!
Finance partner page. Financials data provided by Edgar Online.Dividend data
provided by Hemscott Americas.Historical chart data and daily updates
provided by Commodity Systems, Inc. (CSI). International historical chart
data and daily updates provided by Hemscott Americas. Fund summary, fund
performance and Morningstar Index data provided by Morningstar. Analyst
estimates data provided by Thomson Financial Network. All data povided by
Thomson Financial Network is based solely upon research information provided
by third party analysts.
And this for US Exchanges.
Country Exchange Suffix Delay Data Provider
United States of America American Stock Exchange N/A 20 min Direct
from Exchange
United States of America Chicago Board of Trade .CBT 10 min Comstock
United States of America Chicago Mercantile Exchange .CME 10 min
Comstock
United States of America NASDAQ Stock Exchange N/A 15 min Direct from
Exchange
United States of America New York Board of Trade .NYB 30 min Comstock
United States of America New York Commodities Exchange .CMX 30 min
Comstock
United States of America New York Mercantile Exchange .NYM 30 min
Comstock
United States of America New York Stock Exchange N/A 20 min Direct
from Exchange
United States of America OTC Bulletin Board Market .OB 20 min Direct
from Exchange
United States of America Pink Sheets .PK 15 min Direct from Exchange
----- Original Message -----
From: "mrdavis9" <mrdavis9@xxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, June 27, 2006 5:48 PM
Subject: Re: [amibroker] Re: EOD data
> I am not sure about this, but my understanding is that Yahoo's HISTORICAL
> data comes from CSI, and their EOD used to come from a another supplier.
> However, a few months ago, Yahoo started collecting their own daily
market
> data, and now this is the source of the EOD data.
>
> So maybe the last few months of their HISTORICAL, data is now the data
> that they have been collecting themselves. I would like to hear input
from
> others on this. Ron D
>
>
>
> ----- Original Message -----
> From: "areehoi" <rhoierman@xxxxxxxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Tuesday, June 27, 2006 1:58 PM
> Subject: [amibroker] Re: EOD data
>
>
> > I'll be the contratian. I've usued Yahoo data for a number of years
> > and found it as good as any. Their source is CSI data so it should be
> > Okay. On splits I keep a splits calendar and adjust accordingly. Or,
> > you can redownload periodically (the whole database) as Yahoo adjusts.
> > Lately I've used EODdata and found it excellent. It downloads in
> > seconds so doesnt take the time that Yahoo does to download. I use the
> > AmiQuote that comes with AmiBroker.
> >
> > R.E.(Dick) Hoierman
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "matrix10014" <allansn@xxx> wrote:
> >>
> >> Hi all,
> >> Just setting up Ami,for the first time and was wondering if there were
> >> any strong feelings regarding yahoo EOD vs Quotes plus??
> >>
> >> Any major benefits or drawbacks??
> >>
> >> Any insight appreciated
> >>
> >> Allan
> >>
> >
> >
> >
> >
> >
> >
> >
> >
> > Please note that this group is for discussion between users only.
> >
> > To get support from AmiBroker please send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
> Please note that this group is for discussion between users only.
>
> To get support from AmiBroker please send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> For other support material please check also:
> http://www.amibroker.com/support.html
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
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