Central bankers in the US have long fixated on the equilibrium real interest rate (ERIR) as their lodestar, an obsession that GMO’s James Montier, in The Idolatry of Interest Rates, bemoans as “a massive exercise in navel gazing.” According to Montier, the broad acceptance of the theoretically dubious ERIR — the real interest rate consistent with full employment of labor and capital resources—is not an example of the wisdom of crowds, but rather “groupthink extraordinaire.” Further, investors’ collective preoccupation with interest rates as an economic “cure-all” and their “deification of central bankers” are equally misguided, says Montier.