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Re: FinancialData errors


On Jul 29, 2011, at 3:41 AM, DrMajorBob wrote:

> FUNNY STORY: Here is Tech Support's non-response to my problem, described 
> farther down:
>
> Hello,
>
> Thank you for taking the time to send in this report to us. The  accuracy
> of the financial data depends on how quickly our sources  of data provide
> updates. A 15 minutes delay on current prices is common. Longer delays are
> possible depending on the data. A complete list of the sources queried by
> FinancialData is available at:
>
> 
http://reference.wolfram.com/mathematica/note/FinancialDataSourceInformation.html
>
> We are always looking for alternative sources of financial information to
> query. If you have any suggestions on alternate sources of information we
> should consider, please let us know.
>
> Sincerely,
>
> Sean Clarke
>
>
> 
==========================
==========================
======================
>
> Now, isn't that special? The data is 5 months old, and TS tells me there's 
> a 15-minute delay?
>
> 
==========================
==========================
======================
>
>
> I've found a new (to me) species of error in FinancialData.
>
> One example is the price of the following stock on Feb 10, 2011:
>
> s = "JANFX";
> FinancialData["JANFX", "Name"]
> FinancialData["JANFX", {{2011, 2, 9}, {2011, 2, 11}}]
>
> "Janus Flexible Bond Fund D Shar"
>
> {{{2011, 2, 9}, 10.25}, {{2011, 2, 10}, 10.23}, {{2011, 2, 11},
>     10.24}}
>
> As you see, FinancialData says the price was 10.23.
>
> But I BOUGHT the stock through Janus Funds on that day, and the price was
> 10.36.
>
> Moreover, if I go to Yahoo's interactive price chart for the stock at the
> following page, 10.36 is the price I find:
>
> 
http://finance.yahoo.com/echarts?s=JANFX+Interactive#chart3:symbol=janfx;range=ytd;indicator=volume;charttype=line;crosshair=on;ohlcvalues=0;logscale=on;source=undefined
>
> So... where are the errors really coming from?
>


The price you bought and shown in yahoo's page was "RawClose" as described in the documentation of FinancialData as a unadjusted price.

In[161]:= FinancialData["JANFX","RawClose",{{2011,2,10},{2011,2,10}}]
Out[161]= {{{2011,2,10},10.36}}

The default query is "Close" which has been adjusted by the dividends and stock splits.

MinHsuan

> This is not an astronomically large price or a Missing["Not Available"]
> price; it's within 2% of the correct price. But it's wrong.
>
> These errors make it very difficult to trust FinancialData for any useful
> purpose.
>
> Bobby
>
> --
> DrMajorBob at yahoo.com
>





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