The market capitalization of General Motors in 1929 was $4 billion.
The market capitalization of General Motors at the beginning of this decade was $66 billion.
The market capitalization of General Motors today is $1.6 billion.
(Market capitalization is the number of shares of stock multiplied by the price of one share.)
Source: Planet Money
Stolen in its entirety for my own blog. Thanks!
http://oldbogus.wordpress.com/2008/11/11/how-bad-is-it/