With U.S. Fed entering the stage where the markets expectations for a pause in monetary tightening is running against the Fed statements on the matter, and the ambiguity of the Fed's forward guidance runs against the contradictory claims from the individual Fed policymakers, the real signals as to the Fed's actual decisions factors can be found in the historical data.
Here is the history of the monetary easing by the Fed, the ECB, the Bank of England and the BOJ since the start of the Global Financial Crisis in two charts:
Chart 1: looking at the timeline of various QE programs against the Fed's balancesheet and the St. Louis Fed Financial Stress Index:
There is a strong correlation between adverse changes in the financial stress index and the subsequent launches of new QE programs, globally.
Chart 2: looking at the timeline for QE programs and the evolution of S&P 500 index:
Once again, financial markets conditions strongly determine monetary authorities' responses.
Which brings us to the latest episode of increases in the financial stress, since the end of 3Q 2018 and the questions as to whether the Fed is nearing the point of inflection on its Quantitative Tightening (QT) policy.