Insiderman

Why High Inflation Will Not Take Hold

Maybe I missed this in the comments but if V becomes affected by sentiment (and it has), then a rapid increase in V will have to be accompanied by a rapid decrease in M. Unfortunately, rapidly decreasing M requires that the Fed rapidly sell Treasury securities. increasing the reserve requirement (an elephant gun), etc.

How will the Fed sell Treasuries into this market without a HUGE decrease in Treasury prices and consequent increase in interest rates... usually at a lag. So we'll likely have a brief period of inflatiion accompanied by--yet again--a recession.

As a technical addition to the author's formula, if you use T as transactions, then you cannot use Pi as price level. MV = Sum (Pi x Ti) where Pi is the price of the ith transaction Ti. The MV = PQ formulation, where Q is the real value of final expenditures. I prefer the MV = PY formulation because Y can be used to indicate real income or yeal expenditures in the basic GDP model.

So, if V increases dramatically, M must fall dramatically. Typically P and Q will also shift about in the short-term. Unfortunately, government operational, administrative, and recognition lags will tend to cause the adjustment of M to be inaccruate with respect to the impact of V. P and Q fluctuate cyclically in the process.