This is a link speculating about 990N (e-mails from several people discussing it) http://www.safehaven.com/forums-4920.htm
Regarding my comment about market manipulation: I'm just cynical & remember the stock market doing some very interesting things in 1998/99 (way down then up a bit at the end of the day).
Here is a link to a google search on 990N http://www.google.com/search?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=990N
I checked SNOPES & Urbanlegends & didn't find anything on this topic, but it appears to be new. Personally, I think that this may be baseless rumors, done to manipulate investors (that is what most stuff posted about the stockmarket on the internet is).
I know that 1+1 is 2 ONLY because, gosh golly, SNOPES said it was. If only Bertrand Russell had known the Secret of Proof -- go to Snopes -- he would have never bothered with that vanity press "Principia Mathematica" of his.