A high yield investment program (or HYIP) is one of the most interesting investments out there. However, like a number of investment opportunities, it has been the target of a number of scams.
The simple version is that it is an investment method that offers a high rate of returns with some risk. The investor can invest small amounts into a HYIP, which can, if it does well, yields a higher-than-normal rate of return, which you can then cash out or re-invest. While investing, you can discuss how the investments are doing and find out about scams on websites called monitors, which keep an eye on how HYIPs do.