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I think that overall CSI is a very good source for data, as some other forum
users have indicated. But just be aware there is one major problem with
their stock data that I have discovered - the volume data is incorrect if a
stock has had a split. e.g. Say a stock trades exactly 1 million shares
every day and it closes today at 20 and after market close it has a 2:1
split, then next day it starts trading at 10 (or so). Now if you were to
look at the historical volume after the split, you will still see CSI
showing it as 1 million shares, though it should be 2 million (as market cap
doesn't change after a stock split i.e. 1 million x 20 = 2 million x 10).
Why is this important? In my Metastock Explorations, I use the 50day Mvg Avg
of volume multiplied by price as a filter to exclude small caps. Using the
example given above, I will get an erroneous result for 49 days after the
stock split.
You can verify this yourself by checking the volume before and after a stock
split by calling up historical prices at Yahoo Finance (their data provider
is CSI); track several stocks about to split starting today. I have done
this a few times in the past and their volume data after a stock split
remained unadjusted for the split (the last time I did this many months ago;
its possible they may have fixed this). I did call them many months ago to
bring it to their attention but the lady who answered was arrogant and
insistent that their data was the cleanest in the industry and refused to
entertain any doubts, so I just hung up.
Again, this only applies to stock volume data, post-split. I don't have any
experience with their mutual fund or futures data.
Shashi
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----- Original Message -----=20
From: Michael Gilbert=20
To: metastock@xxxxxxxxxxxxx=20
Sent: Wednesday, June 27, 2001 1:34 AM
Subject: dial data & eurocurrency
If anyone is using dial data and has downloaded the eurocurrency =
symbol E1 ,any month, your data is ROUNDED
to 3 decimals. Dial Data cannot fix this. I was told that they WILL =
NOT FIX THIS. If you are trading off of this
data source, then GIGO applies.
If anyone has a moment, please share with me who has been your BEST =
source of reliable, clean Data?? (NOT THE CHEAPEST but the BEST)
thanking you in advance
Michael
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