So how do I get a copy of the misc.invest FAQ?

The best way is through anonymous FTP.

rtfm.mit.edu:/pub/usenet/news.answers/investment-faq/general/*

It's also posted monthly to the Usenet groups misc.invest, misc.answers, and news.answers.

If you only have e-mail access, you can send electronic mail.

To: mail-server@rtfm.mit.edu
Subject: <subject line is ignored>
Body: send usenet/news.answers/investment-faq/general/*