HYIP is High-Yield Investment Programs. It is an evolution of the pyramid system.

The Wikipedia article on HYIP begins with this terse statement: "A High-Yield Investment Program (HYIP) is a type of scam. At one time, it was used to refer to an investment program which may have offered a high return on investment. The term "HYIP" was abused by the operators of scams to camouflage their scams as legitimate investments. Due to this overuse by the operators, HYIP has become synonymous with scam or Ponzi scheme. The usage of the term has evolved to refer to a kind of Ponzi scheme that recruits "investors" through the Internet."

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