Thanks. With R (free stat package) and google colab one could code what you have. There is an R package to download stocks form yahoo finance (quantmod) and calculate returns. Will try to do it over the next two weeks or so.

Thanks! So if I may what is the "optimal" permanent portfolio people are using? is it the 60/30/10 IEI VTI GLD or is there a better mix?

Noob here so please be kind.......like many people (I suspect) I've spent countless hours on portfoliovisualizer looking for some kind of holy grail. Now I am looking for less work and a good permanent portfolio. I stumbled upon http://www.lazyportfolioetf.com/ and saw the gyroscopic portfolio and w...