As the markets push once again into record territory the question of valuations becomes ever more important. While valuations are a poor timing tool in the short term for investors, in the long run valuation levels have everything to do with future returns. The current levels of profits, as a share of GDP, are at record levels. This is interesting because corporate profits should be a reflection of the underlying economic strength. However, in recent years, due to financial engineering, wage and employment suppression and increase in productivity, corporate profits have become extremely deviated. This deviation begs the question of sustainability. As we know from repeatedly from history, extrapolated projections rarely happen. Could this time be different? Sure. However, believing that historical tendencies have evolved into a new paradigm will likely have the same results as playing leapfrog with a Unicorn. There is mounting evidence, from valuations being paid in M&A deals, junk bond yields, margin debt and price extensions from long term means, "irrational exuberance" is once again returning to the financial markets.