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At 12:43 PM 12/16/97 -0500, Craig Nelson wrote:
>
>
>I received the response below from Prophet in regards to why Prophet's INDU
>cash prices differed from Bloomberg's data. Can you believe the BS answer
>I got?! I can't believe these guys actually do business! Only God knows
>what other data problems they have.
>
>Regards,
>Craig
> Forwarded by Craig Nelson/NY/SBCM on 12/16/97 12:37
>PM ---------------------------
>BetterData@xxxxxxx on 12/16/97 12:19:29 PM
>
>To: Craig Nelson/NY/SBCM
>cc:
>Subject: Re: Cash Index
>In a message dated 97-12-16 11:30:44 EST, you write:
>> >>partial snip
>> Also, I found major diffs between your
>> data and Bloomberg's for *INDU, on the High, Low, and Open; the Close
>was
>> OK. Some diffs were as much as 20 points or so. Can I ask why this
>would
>> happen? Do you check your data against a second source to verify
>accuracy?
>The prices we get show the theoretical highs and lows for these indices;
>Bloomberg probably gets the actuals highs and lows. So typically our ranges
>will be greater.
>>>small snip
>
>- Tim
Don't be TOO shocked Craig, but even infamous NASDAQ-listed DBC Signal uses
'theoretical' OHL numbers on the DOW, which often differ widely from the
actual numbers, whilst their counterpart DBC BMI posts the 'actual' Dow
numbers. Go figure!
For example, to illustrate my point, as I'm writing this at 10:45 PST, DBC
Signal International Feed is reporting for the Dow: 7839.29 Open, 8059.86
High 7910.16 Low ( which believe it or not actually changed in the ten
minutes that I was writing this and not by any material change in the Dow
numbers I might add.)
DBC BMI reports for the Dow: 7924.34 Open, 8020.32 High and 7924.34 Low.
Signal reports a theoretical calculation while BMI reports an 'actual' OHL.
CLOSE is 'usually' the same and often not always 'exactly' the same.
OTOH, BMI often reports erroneous 'Net' +- change in points, while the DBC
Signal numbers on 'Net' are usually correct. That may not sound like a big
deal but I sometimes use those Net change numbers in quick trading
decisions, so to me it is an annoyance when they are wrong and I ask you:
How tough could it be to program the computer software to make that
calculation correctly?
Craig Nelson said about Prophet:
>Can you believe the BS answer I got?! I can't believe these guys actually
do >business! Only God knows what other data problems they have.
It appears the same can possibly also be said about others in the data
providing business.
Michael Paauwe
mpaauwe@xxxxxxxxxx
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