The Fed has spent the last 16 years fueling the mother of all financial bubbles on Wall Street. And by way of spillover effects on the mortgage market, it has also fostered parallel bubbles in commercial and residential real estate assets alike, across the length and breadth of the land.

Now these bubbles are once again bursting, of course, under the inexorable force of economic gravity (i.e. unsupportable debt and absurd valuation multiples), meaning that both ends of the Acela Corridor will be soon bleating loudly for another round of bailouts and frenetic money printing. But before the powers that be are able to rekindle yet another monetary rinse-and-repeat episode, the question recurs as to what has been accomplished since August 2008 by the $6.5 trillion increase in the Fed's balance sheet over that interval?

Well, when it comes to measuring the bread and butter output of the US economy—manufactured goods, energy, mining and gas, electric, and other utilities—the answer is pretty much nothing. The industrial production index today stands hardly a tad above its August 2008 level. To be exact, the index has gained just 0.15% per annum during the last 16 years.

That's an abrupt comedown from the prior trend. As it happened, between 1950 and 2008, the industrial production index rose by 3.50% per year. That is to say, unprecedented money-pumping and the resulting diminutive level of interest rates generated an industrial output growth rate equal to only 4% of its historic level, and not for a year or two but the better part of the first quarter of the Twenty-First century.

Our Keynesian monetary central planners, however, would say the flatlining of industrial production makes no nevermind because they have managed to keep total GDP expanding at an arguably respectable rate. Thus, between Q2 2008 and Q2 2024 real GDP rose from $16.9 trillion to $22.9 trillion or by 1.91% per annum, according to the official statistics. That was well short of the 3.41% per annum growth rate over the same 1950 to 2008 interval, but at 56% of its historic average, it wasn't macroeconomic chopped liver, either.