Indicates companies that are not able or willing to provide disclosure to the public markets - either to a regulator, an exchange or Pink Sheets. Companies in this category do not make Current Information available via Pink Sheets News Service, or if they do, the available information is older than six months. This category includes defunct companies that have ceased operations as well as 'dark' companies with questionable management and market disclosure practices. Publicly traded companies that are not willing to provide information to investors should be treated with suspicion and their securities should be considered highly risky.
http://www.pinksheets.com/pink/otcguide/investors_market_tie…