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 " Guy 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 > -- View this message in context: http://r.789695.n4.nabble.com/Free-Stock-Quotes-Yahoo-Finance-Adjusted-Closing-Prices-tp3253189p3253230.html Sent from the Rmetrics mailing list archive at Nabble.com. _______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-finance -- Subscriber-posting only. If you want to post, subscribe first. -- Also note that this is not the r-help list where general R questions should go.
