The Internet is a viable source for email-spam related to penny stock listings fraud promotion. Oxford revealed that up to 15% of all Internet spam was related to penny stock in a study. According to that study, those who fell for these scams are liable to lose up to 8% of their investments in two days. These spammers, on the other hand, are liable to make a return of between 4.9% and 6% on their penny stocks when they sell.