No one seemed to know enough about this to respond before so I did a
bit more research on this myself, and decided to post what I found in
case anyone was interested. Well, it turns out I was wrong about one
thing, I thought the Private Company Index was just starting up but I
found a press release on Yahoo saying they were celebrating their 2nd
anniversary. The article also says a little about how they keep track
of the companies financial info for investors. Lastly it says that so
far it has shown a 420% greater return than the average of the Dow,
NASDAQ and S&P Small Cap 600 indices performance in the same 24
month period. (I placed the link to the press release below just in
case anyone cares to see it)
Anyways, just wanted to share the information. Hope it is useful to you.
http://biz.yahoo.com/prnews/070913/aqth132.html?.v=12