Investing in Pink Sheets stocks is highly risky...we all know that. That said, every investor has the legal right to know the risks they face.
Pink sheet stocks don't generally list "risk factors", nor are they required to. If you are referencing PIPI, what exactly do you mean? They haven't filed for years and years.
Even some SEC filer's are exempted from listing the risks related to their stock. In such cases you will see something like this in the annual reports......
Item 1A. Risk Factors
Smaller reporting companies are not required to provide the information required by this item .
Before anyone can trade penny stocks, they must be qualified by their broker and declare they understand the risks involved with trading pennies......
Penny Stock Rules ~ From the SEC
The term “penny stock” generally refers to low-priced (below $5), speculative securities of very small companies. While penny stocks generally are quoted over-the-counter, such as on the OTC Bulletin Board or in the Pink Sheets, they may also trade on securities exchanges, including foreign securities exchanges. In addition, penny stocks include the securities of certain private companies with no active trading market.
Before a broker-dealer can sell a penny stock, SEC rules require the firm to first approve the customer for the transaction and receive from the customer a written agreement to the transaction. The firm must furnish the customer a document describing the risks of investing in penny stocks. The firm must tell the customer the current market quotation, if any, for the penny stock and the compensation the firm and its broker will receive for the trade. Finally, the firm must send monthly account statements showing the market value of each penny stock held in the customer’s account.
Penny stocks may trade infrequently, which means that it may be difficult to sell penny stock shares once you own them. Because it may be difficult to find quotations for certain penny stocks, they may be impossible to accurately price. Investors in penny stocks should be prepared for the possibility that they may lose their whole investment.