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RE: [amibroker] Re: Amibroker vs. Yahoo Finance - different historical stock prices



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No. He's just saying the prices have been back-adjusted since the first
download. AB does not use the actual prices in Yahoo. Normal place for
back-adjusted prices is OI field without decimal places (Actual Price *
100). I don't know if there's a way to get these in using Amiquote or
not.
--
Terry

-----Original Message-----
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On
Behalf Of tomsoyer_php
Sent: Sunday, February 12, 2006 11:45
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Re: Amibroker vs. Yahoo Finance - different
historical stock prices

Thanks Tomasz. That make sense. But does this mean that Amibroker's 
Close price is the same as Yahoo's Adjusted Close (which adjusted 
for split and dividends)? If so, then how does Amibroker treat day 
high, day low, day open, and day close? For example, if I try to 
calculate day close (C) - day high (H) in Amibroker, does this mean 
the calculation is performed using adjusted Close on unadjusted day 
high?

--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxx> 
wrote:
>
> Hello,
> 
> Most possible reason is you did NOT download all history at once 
today, 
> but downloaded
> some months/years ago, then downloaded some later, then later then 
later.
> Since then Yahoo may have added adjustments (for dividiends for 
example)
> and this has changed HISTORICAL data on Yahoo.
> AmiBroker data stored in local database remained the same (because 
you did not re-download
> entire history again).
> 
> Suggestion: from time to time run FULL download to get adjustments.
> Once you do you will get perfect match.
> 
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message ----- 
> From: "tomsoyer_php" <tom.soyer@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Sunday, February 12, 2006 4:51 PM
> Subject: [amibroker] Amibroker vs. Yahoo Finance - different 
historical stock prices
> 
> 
> > Hi,
> > 
> > I am learning how to use Amibroker and in the process found that 
the 
> > historical stock prices for the stock symbol AA in the Amibroker 
are 
> > different from Yahoo Finance (see below). Does anyone have a 
good 
> > explanation for this?
> > 
> > Thanks,
> > 
> > Tom
> > 
> >      Amibroker Yahoo   Yahoo
> >                Close   Close adj. close
> > 5/29/2003 23.78 24.03 22.74
> > 5/30/2003 24.36 24.61 23.28
> > 6/2/2003 25.04 25.3 23.94
> > 6/3/2003 24.81 25.07 23.72
> > 6/4/2003 25.71 25.98 24.58
> > 6/5/2003 25.58 25.84 24.45
> > 6/6/2003 25.66 25.93 24.53
> > 6/9/2003 25.24 25.5 24.13
> > 6/10/2003 25.68 25.95 24.55
> > 6/11/2003 25.81 26.08 24.68
> > 6/12/2003 25.87 26.14 24.73
> > 6/13/2003 25.32 25.58 24.2
> > 6/16/2003 26.01 26.28 24.86
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 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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