Abstract: The present invention provides a method and system for assuring a minimal guaranteed return on long-term investments, such as mutual funds or variable annuities. The invention includes a method and system for pricing, administration, customer presentation, and reserving relating to the guaranteed minimum return assurance. In addition, the present invention includes a method and system for allowing individual investors to control and easily change their typical asset allocation strategies. In order to accomplish the minimum guaranteed return, the present invention also includes sophisticated projection techniques, such as Monte Carlo simulation of investment performance.