[R-SIG-Finance] Free Stock Quotes - Yahoo Finance & Adjusted Closing Prices

Guy Green guygreen at netvigator.com
Wed Feb 2 01:21:00 CET 2011

The short answer is that Yahoo sometimes has mistakes, including the issue of
splits/bonus issues being improperly reflected.  You will on occasions see
the same thing with every data provider, including the best known paid
providers.  As far as I know, the Yahoo price data is not their own - I
think they get it from a wholesale data provider.

I would suggest that you contact Yahoo.  They will fix it if you explain the
error - it might take a couple of days.  Use their "
http://help.yahoo.com/l/us/yahoo/finance/dataissues.html Yahoo! Finance Data
Inaccuracy Form "


Lui ## wrote:
> The dataimport works well - however the adjustments do not always seem
> reasonable to me... Several companies (e.g. Adidas - ADS.DE,
> Beiersdorf - BEI.DE) have had a stock split - but its not reflected in
> the adjusted price (only in the UNADJUSTED closing price). Did anybody
> have a similar problem? Were the adjustments for splits are not made
> for the quoted adjusted prices but seemingly for the unadjusted? I
> thought that Yahoo might have mixed up the columns, but the
> "unadjusted closing prices" sometimes is indeed unadjusted...
> Does anybody have experience with Yahoo Finance data?
> Or even better: Does anybody have a more reliable source of stock data
> (preferably german stocks).
> Thank you very much!
> Have a nice week!
> Lui

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