That's the great thing, it doesn't really matter what the content of the report is, it doesn't have to be A+++, it can just be a mashup of existing articles or some public domain writeup or anything really, what's more important is the promise of it and the fact it will capture emails.
Anyways, the viewers will go to the pages of your site anyways even if you capture their email, so you won't lose anything by doing this, just gain their emails before they hit the page, which is something valuable.
What you could do is hire a writer for about 5-10 bucks to just drum up something quick - the report can be only a few pages.
What I'd do is make the report just like a salesletter that is subtly pitching a product, that way they think they're getting something of value but they're actually being secretly sold something that's only clear near the end of the report via a 'special exclusive link' or whatnot.
Hell, if you think about it, if you're into data brokerage, you could probably just sell the finance targeted lists you create with this for a LOT more than you could make in adsense in a month.