The Federal Reserve's latest messaging has demonstrated that expectations can sometimes be as powerful as action. This week's update explains Mervyn King's famous "Maradona theory of interest rates" and explores how Fed Chair Kevin Warsh is using communication and credibility to influence markets without immediately changing monetary policy .
Last week, the number one conversation that colleagues and clients were discussing was the World Cup, and in particular England’s chances in the tournament. Would they be able to overcome Argentina in the semi-finals, and could they repeat the success of the England team of 1966?
The fact that England played their nemesis, Argentina, for those who can remember, it brings back memories of the World Cup match in Mexico City when England were beaten by Argentina 40 years ago, thanks to the “luck” and brilliance of Diego Maradona and his two goals.
In May 2005, Mervyn King, as governor of the Bank of England, gave a speech about Monetary Theory.
In this speech he coined the phrase “Maradona theory of interest rates”, in which he cited Maradona’s second goal against England in that match in 1986 as an analogy to explain how central banks can guide financial markets by using forward guidance, rather than actively increasing interest rates.
For Maradona’s second goal, he appeared to dribble erratically around five defenders, but in reality, he ran in a virtually straight line. He succeeded because the defenders reacted to his feints, moving out of his path in anticipation of where they expected him to go.
In central banking, this translates to the power of expectations. By communicating effectively, feinting to be "hawkish" or "dovish", the central bank can guide market expectations and get financial conditions to tighten or loosen on their own, allowing the central bank to achieve its targets without frequently moving official interest rates.
Last week the new Fed Chairman Kevin Warsh spoke to Congress at his first semi-annual testimony. He framed inflation as the Fed’s primary concern, saying the FOMC has “no tolerance” for inflation staying above target and that bringing it down is the top priority, even at some cost to growth and employment. Despite the hawkish rhetoric on inflation, Warsh deliberately did not signal an imminent rate hike at the upcoming July FOMC meeting, which markets had feared could be on the table.
On Tuesday, US CPI data was published and came in materially softer than consensus, giving the Federal Reserve more room to stay patient while maintaining a hawkish message. Headline CPI slowed to 3.5% year on year from 4.2% in May, below the consensus of 3.8%, while monthly CPI fell 0.4% against expectations for a 0.1% decline and Core CPI was also softer, easing to 2.6% year on year from 2.9%.
As a result of this inflation data, Warsh can continue to present the Fed as intolerant of inflation without forcing policy tighter into a cooling price backdrop. His rhetoric looks more like a framework that is producing the desired outcome.
A central banker can be most effective against inflation when they are credible enough that they do not immediately need to raise rates. When households and businesses are confident the central bank will tighten policy if required, inflation expectations can ease before any actual move is made. This is what Mervyn King meant when he memorably called it the “Maradona theory of interest rates.” In that sense, Tuesday’s CPI data bolstered Warsh’s credibility, allowing him to strike a firmly hawkish tone while still waiting before delivering a rate hike.
In many ways, the Fed’s current approach mirrors Maradona’s famous run: controlled, deliberate, and ultimately reliant on how others respond rather than constant changes in direction. By reinforcing its intolerance for inflation while holding back from immediate action, the Fed is allowing expectations to do much of the heavy lifting.
