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Rick,
not only that, I just discovered that historical prices sometimes
diverge from
reality. Take a favourit of mine -SINA- on July 17th:
Jul-17-03 25.84 26.53 23.00 24.50 10,360,700 24.50
http://table.finance.yahoo.com/k?s=sina&g=d
On the NASDAQ home you find this
07/17/2003 25.840 26.530 24.150 24.500 10,357,240
http://quotes.nasdaq.com/quote.dll?
page=charting&mode=basics&intraday=off&timeframe=5d&charttype=ohlc&spl
its=off&movingaverage=none&lowerstudy=volume&comparison=off&index=&dri
lldown=off&symbol=SINA&selected=SINA
Since I had ordered a stoploss at 23.42 this mattered to me quite
some, especially since SINA rebounded the next day to 29$ <g>
Also the charts in AB will show wrong data if you use Yahoo as a
source.
I have emailed Yahoo and hope they will provide some answers...
Regards
Andreas
--- In amibroker@xxxxxxxxxxxxxxx, "Rik Rasmussen" <hrasmussen@xxxx>
wrote:
> I know some of you are using Yahoo data.
>
> In the Stock Analyzer we also use Yahoo data.
>
> I have just discovered a problem in Yahoo data.
>
> Example is QQQ. If you check the historical data for QQQ on Yahoo
it should
> be complete through Jul18th.
>
> Sometimes it is. But If I check it a minute later it might stop
with JUL 16
> data.
>
> Repeated checks get randomly alternating returns of those two
situations.
>
> Also happens on NDX, and I am guessing could be happening on any
call for
> Yahoo historical data.
>
> I noticed this when another Stock Analyzer user reported a signal I
was not
> seeing on my chart.
>
> At this time I would be careful if using Yahoo data.
> Rik Rasmussen
> Stock Analyzer mailing list moderator
> http://groups.yahoo.com/group/stockanalyzer/
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