The U.S. Securities and Exchange Commission (SEC) has suspended trading for 35 companies that allegedly benefited from spam e-mail campaigns to hype their stocks.The SEC action Thursday is the most suspensions of companies with stock hyped in spam, the SEC said in a news release. The suspensions, which will last for 10 business days, are part of a stepped-up SEC effort called Operation Spamalot aimed at protecting investors from potentially fraudulent spam campaigns hyping small-company stock, the SEC said. The e-mails used phrases such as "ready to explode," "ride the bull" and "fast money."The 35 companies have been quoted on the Pink Sheets over-the-counter stock service. They are not listed on any exchange or on the OTC Bulletin Board, the SEC said.The SEC estimated that 100 million such stock-trading e-mail messages are sent each week, often triggering dramatic spikes in share prices and trading volumes before the spamming stops and investors lose their money, the SEC said."When spam clogs our mailboxes, it\u2019s annoying," SEC Chairman Christopher Cox said in a statement. "When it rips off investors, it\u2019s illegal and destructive. Today\u2019s trading suspensions, and actions that will follow, should send a clear message to spammers: The SEC will hold you accountable."The SEC said it continues to investigate the source of the spam.Among the spam campaigns noted by the SEC:\u2022 On Dec. 15, shares in Apparel Manufacturing Associates closed at US$0.06, with a trading volume of 3,500 shares. After a weekend spam campaign proclaiming, "Huge news expected out on APPM, get in before the wire, We\u2019re taking it all the way to $1.00," trading volume on Dec. 18, volume hit 484,568 shares with the price spiking to over $0.19 a share. Two days later the price climbed to $0.45. By Dec. 27, the price was back down to $0.10 on trading volume of 65,350 shares.\u2022 On Dec. 19, trading in Goldmark Industries closed at $0.17 on trading volume of 126,286 shares. On Dec. 20, the spam campaign started, with e-mail proclaiming "GDKI IS MAKING EVERYONE BANK!" and setting a five-day price target of $2. By Dec. 28, spam boasted of a price spike of 152 percent in two days and promised a five-day price target of $1. That same day, the company\u2019s stock closed at $.35 on a volume of more than 5 million shares. By Jan. 9, the closing share price was back down to $0.15.Advanced Powerline Technologies, iPackets International, Software Effective Solutions, Sports-stuff.com and UBA Technology are among the other companies affected by the SEC suspensions. Secure Computing, a cybersecurity software vendor, praised the SEC for its action. The 35 companies suspended represent some of the most "mass-promoted" companies, the company said.There are more than 600 stock symbols sold on the Pink Sheets and OTC Bulletin Board exchanges that have been promoted through spam in the past year, the company said in an e-mail.-Grant Gross, IDG News Service (Washington Bureau)Related Links:\n\nFive Things You Should Know About Fighting Spam\n\nThe Changing Definition of "Spam"Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.