There are a plethora of websites on the Internet that allow people to evaluate both Harry Browne’s strategy in addition to the general class of gyroscopic portfolios out there.
The following are some excellent resources.
“Portfolio Visualizer provides online portfolio analysis tools for backtesting, Monte Carlo simulation, tactical asset allocation and optimization, and investment analysis tools for exploring factor regressions, correlations and efficient frontiers.”
“Asset allocation is a vitally important financial topic that too often devolves into a confusing mess of numbers that paralyze experts and discourage new investors. Portfolio Charts cuts through the noise by offering simple but sophisticated visualization tools that illustrate both the best and worst times for any collection of assets all in a single image. “
The Bogleheads Forum
“The Bogleheads are every-day citizens with an interest in investing and personal finance. The members not only discuss their own financial issues, but enthusiastically provide help to others.”