Here is the data directly from the NYSE's website: http://www.nysedata.com/nysedata/asp/factbook/viewer_edition.asp?mode=table&key=3000&category=3 http://www.nysedata.com/nysedata/default.aspx?tabid=405
It seems close to TeleChart. I'm not sure where QP and Yahoo are getting their numbers from. Nick --- In [email protected], "nhall" <[EMAIL PROTECTED]> wrote: > > I'm evaluating whether I should use Quotes Plus or TeleChart as my > AmiBroker data provider and have come across differences in the volume > for the NYSE index. > > Quotes Plus gives the volume figures for !NYA: > > 6/1/2001: 10,102,619 > 1/3/2007: 34,291,628 > 6/1/2007: 29,270,184 > > and that data basically matches Yahoo's also. > > TeleChart gives for NYSE: > > 6/1/2001: 1,010,200 > 1/3/2007: 2,611,500 > 6/1/2007: 1,481,100 > > The older data looks about the same (although scaled differently), but > the newer data is off by quite a bit using the same scaling factor. > The data companies don't seem to know why they are different from each > other. Does anyone have any ideas or care to add recommendations for > one data vendor over the other? Thanks, > > Nick >
