So, to "predict" the S&P500, I choose from 1y, 10y, 2yr,.... etc down that list?
So, I'm choosing the path {a,b,c,...,..i} by matching-or-lagging {a,b,c,...,..i}??
I'll take another look right now..... but it sounds like a lot of trouble to compute an MLE of a minimized-differences surface...