The Securities and Exchange Commission warned investors about the risk of fraud, accounting problems and other abuses at companies that obtain stock listings through so-called reverse mergers.

The warning on Thursday comes amid a rash of accounting scandals involving China-based companies listed on U.S. exchanges through reverse mergers, or mergers with U.S. shell companies. “Many companies either fail or struggle to remain viable following a reverse merger,” the SEC said in an investor bulletin. Investors should be especially wary of reverse merger operating companies that are “nonreporting,” meaning they are not required to file reports with the SEC, the agency said. “Keep in mind that information from online blogs, social networking sites and even a company’s own website may be inaccurate and sometimes intentionally misleading,” the SEC said. [Reuters]