Companies that trade over-the-counter (OTC) are not as closely regulated as exchange-listed stocks and are subject to less stringent disclosure requirements. OTC companies do not have to meet the same level of disclosure with specific compliance and reporting requirements as companies that trade on the NASDAQ or NYSE exchanges. As a result, OTC stocks are difficult to research, making them risky investments. They are also usually less liquid, making them difficult to trade and subject to market manipulation.