Will the Real Volume Please Stand Up ?

Here's what I find for today's volume on Nasdaq:

finance.yahoo.com -->1,564,802,000
marketwatch.com -->1,524,209,355
bigcharts.com -->1,524,089,723

What is the real volume?!?! What is the official source of that info?!?

[ok this may seem a bit anal but I just don't understand why there must be any difference!]
 
Quote from ari_veru:



www.nasdaq.com should have the correct info,

it has the volume at 1,567,250,000

wait, the volume just changed, looks like they are counting the after hours trades, so you'll have to find another source
 
Quote from Babak:

where on nasdaq.com? I've looked but can't find it? TIA

The volume is on the top of the chart on the front page. Took me some time to find it too.
 
Which brings us back to square one. Where is the real volume just normal trading hours) for Nasdaq and NYSE?
 
ok, another try ... :)

Anyone know where to get the official number for end of day volume (as well as up/down volume) for Nasdaq and NYSE?

Thanks in advance.
 
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