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Re: FinancialData Function Not Working for Property "Members"

  • To: mathgroup at smc.vnet.net
  • Subject: [mg116696] Re: FinancialData Function Not Working for Property "Members"
  • From: DrMajorBob <btreat1 at austin.rr.com>
  • Date: Thu, 24 Feb 2011 06:22:52 -0500 (EST)

Whenever I call FinancialData, I just cross my fingers and hope.

Bobby

On Wed, 23 Feb 2011 04:25:32 -0600, Gregory Lypny  
<gregory.lypny at videotron.ca> wrote:

> Hi Syd,
>
> Well put.  That was the point I was making less formally in the post  
> that started this thread when I wrote
>
> I'm concerned because I have notebooks that I share with students and  
> colleagues, and the analyses in
> them can't be done if the ticker symbols are not picked up!
>
> There is an expectation of availability that arises from, as you say, an  
> implicit guarantee of functionality.  As a practical matter, I must now  
> reduce the dependencies of my documents and demonstrations on the  
> availability of third-party data by hard-coding it into my documents.  I  
> can create a notebook with prices of specified S&P companies, if they  
> are available, for a fixed range of dates, say, January, 2009 through  
> January, 2011, where otherwise I would have left the end date as today  
> so that the data is updated whenever the document is opened.  The fixed  
> end date means that from time to time, I must review all of my  
> documents, making sure that new data is available, update manually if it  
> is, and then redistribute the documents, which is what I was doing in  
> the pre-computable-data days using my own data sources.
>
> Regards,
>
> Gregory
>
>
>
> On Mon, Feb 21, 2011, at 10:42 PM, Syd Geraghty wrote:
>
>> Gregory,
>>
>> To respond to your explanation:
>>
>> "But might it not have to do with Yahoo Finance not making the  
>> information available anymore as Min Hsuan Peng suggested?"
>>
>> That may perhaps be true and it is central to one of my main concerns  
>> about the direction that WRI are taking with "Computable Data", "free  
>> form input", and Wolfram Alpha (W|A).
>>
>> There is a tendency toward implicit guarantee of functionality away  
>> from "explicit best efforts guarantee of functionality" (which is  
>> generally well documented) in the newer product offerings such as W|A  
>> and newer features being implemented in Mathematica itself!
>>
>> If something as fundamental (and clearly documented with examples in  
>> the Documentation Center) as the elementary expression  
>> FinancialData["SP500", "Members"] is not within WRI's ability to  
>> support in perpetuity then extrapolating that scenario to other third  
>> party data dependencies potentially makes development of products based  
>> on the WRI ecosystem very problematic.
>>
>> I prefer to think this particular problem is just a data management bug  
>> and not systemic. Time will tell.
>>
>> I still have reservations about the use of free form inputs (which  
>> inherently cannot have a documented output) and W|A results where the  
>> implication is that results are "reliable" and will continue to be "in  
>> some sense" repeatable.
>>
>> I trust that we Mathematica and Wolfram | Alpha users are not on an  
>> experimental roller coaster which is being constructed in real time  
>> without a net.
>>
>> Cheers .... Syd
>>
>> Syd Geraghty B.Sc, M.Sc.
>>
>> sydgeraghty at mac.com
>>
>> Mathematica 8.0 for Mac OS X x86 (64-bit) (November 6, 2010)
>> MacOS X V 10.6.5 Snow Leopard
>> MacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM
>>
>> On Feb 21, 2011, at 5:12 PM, Gregory Lypny wrote:
>>
>>> Hi Syd,
>>>
>>> Thanks for responding.  But might it not have to do with Yahoo Finance  
>>> not making the information available anymore as Min Hsuan Peng  
>>> suggested?
>>>
>>> Regards,
>>>
>>> Gregory
>>>
>>>
>>> On Mon, Feb 21, 2011, at 7:30 PM, Syd Geraghty wrote:
>>>
>>>> Hi Greg,
>>>>
>>>> A quick check on my system reveals that your example and examples in  
>>>> the documentation show that a data feed has a bug.
>>>>
>>>> Your example:
>>>>
>>>> In[14]:= FinancialData["SP500", "Members"]
>>>>
>>>> Out[14]= Missing["NotAvailable"]
>>>>
>>>> And from the documentation for FinancialData[]:
>>>>
>>>> In[2]:= FinancialData["SP500"]
>>>>
>>>> Out[2]= 1343.01
>>>>
>>>> which is OK but then
>>>>
>>>> In[3]:= Take[FinancialData["SP500", "Members"], 10]
>>>>
>>>> During evaluation of In[3]:= Take::take: Cannot take positions 1  
>>>> through 10 in Missing[NotAvailable]. >>
>>>>
>>>> Out[3]= Take[Missing["NotAvailable"], 10]
>>>>
>>>> Suggest a bug report.
>>>>
>>>> Cheers .... Syd
>>>>
>>>> Syd Geraghty B.Sc, M.Sc.
>>>>
>>>> sydgeraghty at mac.com
>>>>
>>>> Mathematica 8.0 for Mac OS X x86 (64-bit) (November 6, 2010)
>>>> MacOS X V 10.6.5 Snow Leopard
>>>> MacBook Pro 2.33 GHz Intel Core 2 Duo  2GB RAM
>>>>
>>>> On Feb 19, 2011, at 2:15 AM, Gregory Lypny wrote:
>>>>
>>>>> Hello anyone who uses the FinancialData function,
>>>>>
>>>>> I used to be able to get the members of the S&P500 and the S&P100  
>>>>> using
>>>>>
>>>>> 	FinancialData["SP500", "Members"]
>>>>>
>>>>> and then the ticker symbols to do analyses.  But both yesterday and
>>>>> today, the function returns, what appears to be a dash or hyphen (-).
>>>>> This also happens for industry members such as FinancialData["Books",
>>>>> "Members"] and FinancialData["Drugs", "Members"], where I used the
>>>>> examples in the built-in Help system, but foreign exchanges like
>>>>> Frankfurt work fine.
>>>>>
>>>>> Any thoughts on why this happens?  I'm concerned because I have
>>>>> notebooks that I share with students and colleagues, and the  
>>>>> analyses in
>>>>> them can't be done if the ticker symbols are not picked up!
>>>>>
>>>>> Regards,
>>>>>
>>>>> Gregory
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>
>


-- 
DrMajorBob at yahoo.com


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