And trained as an undergrad physics major I also love dimensionless analysis -- that you get by using ratios where the units cancel out. Like Price/Book. I wonder about inflated book values, that in a deflation books not only go down, but the fraudulent part of them also goes down. While the lower orb -- below the box -- of 1931 and 1932 represent a pendulum overswing into disdain for real value, just because it is in a stock, I wonder what the final take on fraudulent book value will be?
And bad books mean bond defaults. I wonder how bond defaults are factored in the bond yield shown?
Trained as a graduate in engineering mechanics, I agree. :) That is just a marvelous graphic, isn't it?