As I recall, the composition of indices is reviewed quarterly so one has to be prepared to change the composition that frequently. I presume that Nasdaq provides (perhaps on request) the changes through the years on their website. Handling those changes and future ones is an uphill battle and is just one of the reasons so many only trade the indices.
Bill ----- Original Message ----- From: "gonzagags" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, March 11, 2008 2:02 PM Subject: [amibroker] Historic series Nasdaq100? > Hello > I've downloaded from Yahoo the 20-years Nasdaq shares in order to > backtest in Amibroker, but I have now a big doubt. > > Are the tickers I have downloaded, ALL the tickers of the 20 years?? > > because I think that if sometimes some tickers fall from Nasdaq, and > other ones go into Nasdaq, the historic backtest using the nasdaq > tickers of today, is not realistic.. > > Or not? Is there any way to have the real Nasdaq100, with inputs and > outputs?? > > Thanks very much.. > > > > > > Please note that this group is for discussion between users only. > > To get support from AmiBroker please send an e-mail directly to > SUPPORT {at} amibroker.com > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > http://www.amibroker.com/devlog/ > > For other support material please check also: > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.21.7/1319 - Release Date: 3/8/2008 > 10:14 AM > >
