Yes the market lost value, and yes it was proably an unsustainable bubble. There is no external value to the market -- it is only a collection of the "opinions" of investors.
Opinions differ on whether the market is undervalued. Only time will tell. However, here are a couple of knowledgable opinions:
1) Alan Newman, Cross Currents: Newman is a perma-bear and a bit hysterical, but his long-term historical analysis is interesting. His site does not allow copying text, but he estimates it will take 13 years for the Dow to reach its previous peak.
http://www.cross-currents.net/charts.htm 2) Carl Swedlin, Decisionpoint: Swedlin is very impartial and level-headed. He is one of my favorite analysts. Although he is mostly a technician and goes with market direction, he has posted for years that the market is overlvalued. Although the current Price-Earning of the S&P is about 15 (which historically is a fair value), Swedlin says it does not include large extraordinary items. With those included, here are his projections of fair value:
http://www.decisionpoint.com/ChartSpotliteFiles/090213_earn.htmlAnd here is a letter asking him about valuation:
Hi Carl,
I really enjoy your service and have for about nine years. Thank you for all your hard work and dedication. I was wondering if you could tell me the potential technical "bottom" numbers for the Dow, S&P 500, and Nasdaq?
Thank you very much.
ANSWER: I don't follow the Nasdaq. I have rough targets of Dow 3000 and SPX 300 around late-2010. I wouldn't exactly call these "technical" targets -- I am guestimating a total decline of about 80%, using the 1929-1932 bear market 90% decline as a guide. The timing is based on the estimate for the next 4-Year Cycle low, which is due mid-to-late 2010.
While I can't swear by these estimates, I don't think I'm sticking my neck out too far.
Carl
http://www.decisionpoint.com/ChartSpotliteFiles/090227_lows.html