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Re: FinancialData errors

  • To: mathgroup at smc.vnet.net
  • Subject: [mg120637] Re: FinancialData errors
  • From: DrMajorBob <btreat1 at austin.rr.com>
  • Date: Sun, 31 Jul 2011 23:36:36 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <201107222344.TAA28525@smc.vnet.net> <j0u7it$fb7$1@smc.vnet.net>
  • Reply-to: drmajorbob at yahoo.com

You are right, I could have asked for RAW close.

But there IS only one price for that date, and any adjustments need a  
precise explanation.

MinHsuan Peng (thank you!) at Wolfram has provided that explanation.

Using adjusted prices, rather than the ACTUAL prices, as the default seems  
an odd choice, however.

Bobby

On Sun, 31 Jul 2011 07:03:40 -0500, magma <maderri2 at gmail.com> wrote:

> For DrMajorBob
>
> DrMajorBob wrote:
>> Correct in what sense? In the sense that it agrees with an unexplained  
>> column on a Yahoo page?
>
>
>
> No Bobby, in the sense that FinancialData gave you back EXACTLY what
> you asked for!
>
> Let me explain:
> this is perhaps not so well known/interiorized by most users, but
> FinancialData info page clearly states that:
>
> "For historical data, properties such as "High", "Low", "Close" are
> adjusted for stock splits, dividends and related changes."
>
> So when Bobby asked
> FinancialData["JANFX", {{2011, 2, 9}, {2011, 2, 11}}]
>
> Mathematica gave back historical closing prices ADJUSTED for stock spits  
> ,ect.
>
> In order to get the RAW closing prices, one has to ask for
>
> FinancialData["JANFX", "RawClose", {{2011, 2, 9}, {2011, 2, 11}}]
>
> and indeed one gets....
>
> {{{2011, 2, 9}, 10.38}, {{2011, 2, 10}, 10.36}, {{2011, 2, 11},
>   10.37}}
>
> the famous 10.36$ paid by Bobby on Feb 10th 2011.
>
> hth
>


-- 
DrMajorBob at yahoo.com




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