Potash Corp
         

Almost all stock spam consists of pump-and-dump spam, where the seller tries to 'talk up' the price of a stock. Spam spreading negative information about a stock in the hope of making the price fall — a practice known as short-and-distort is very rare. Similarly, most stock spam relates to smallcap or penny stocks, which trade at low prices, allowing spammers to make quick profits by buying large quantities inexpensively. Stocks listed on the major exchanges, which are less susceptible to manipulation, are rarely seen.

         

http://www.spamnation.info/blog/archives/2008/07/potash_corp.html