There are over 6,000 stocks traded in the U.S. that are effectively "foreign," meaning the companies are neither incorporated nor headquartered in the country. Pinning down an exact number is tricky because there is a large group of illiquid over-the-counter issuers that may go days with no trading volume and most databases for such type of information have trouble keeping up with the smallest micro caps and the latest listings and de-listings. As such, these securities represent ownership in potentially major global corporations that could be incredible investment opportunities but otherwise have a low level