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> NASD - dealer mkt, so if the trade is done thru 2
different dealer, the
> trade volume is reported twice. if the trade is done thru
1 dealer by
> crossing between 2 clients/pros, then it will be reported
once only.
> so, the volume does not make any sense in NASD :)
While that detail is good to know, what's important is to
figure out how
to calculate the effective volume. I heard about this issue
over
news a year ago when they talk about rectifying the NASDAQ
volume calculation, "15% of the trades are principle trades
..."
so I figure that a good estimate maybe NASDAQVol * 85% for
it to be comparable to that of NYSE instead of dividing it
by two?
Alan Mi
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