The implied 2.9X global leverage ratio is daunting in itself. But now would be an excellent time to recall the lessons of Greece because the true implications are far more ominous.

Today's raging crisis in Greece was hidden from view for many years in the run-up to its first EU bailout in 2010 because the denominator of its reported leverage ratio—national income or GDP—–was artificially inflated by the debt fueled boom underway in its economy.

In other words, it was caught in a feedback loop. The more it borrowed to finance government deficit spending and business investment, whether profitable or not, the more its Keynesian macro metrics—-that is, GDP accounts based on spending, not real wealth—-registered a falsely rising level of prosperity and capacity to carry its ballooning debt.

Five years later, of course, the picture is much different. Greece's GDP has now shrunk by more than 25%. The abysmal picture depicted in the graph below explains what really happened. Namely, that the bloated denominator of GDP came crashing back to earth, exposing that Greece's true leverage was dramatically higher than the 100% ratio reported in the years before the crisis.