If Mark Carney was going to live up to his billing as a "rock star central banker" – and his £874,000 a year pay package – he had to arrive in Threadneedle Street on a crashing crescendo.
His first 100 days as Bank of England governor have been a noisy medley of speeches, impeccably tailored photo-calls and pzazz.
From the need for more women on banknotes to his love of Everton football club, Carney has had plenty to say on a range of subjects since his appointment on 1 July this year. However, it's the Bank's new policy tool of forward guidance that has provoked the most interest, and a good measure of scepticism, among seasoned Bank-watchers.
Honed by Carney in Canada and adopted by the US Federal Reserve and the ECB in different forms, forward guidance is a way of signalling to the public and financial markets how the Bank will respond to shifts in the economy. In this case, the monetary policy committee has pledged to keep interest rates at their record low of 0.5% at least until the unemployment rate falls to 7%.
"Forward guidance is an attempt to persuade the markets that interest rates are not immediately going to go up," says John Van Reenen, director of the Centre for Economic Performance at the London School of Economics. "It's one more tool in the toolbox."
However, as implemented by Carney and his colleagues in the UK, guidance is hedged about with three separate "knockouts" – rates would rise if inflation, financial stability or the public's inflation expectations got out of control. Moreover, the governor has stressed that the 7% unemployment rate is not a trigger for a rate rise, but a "staging post", which will not necessarily prompt tighter policy.
During a somewhat fraught hearing with MPs on the cross-party Treasury select committee last month, in which Carney sought to clarify the policy, chairman Andrew Tyrie expostulated that it would be a hard one to explain "down the Dog and Duck".
Financial markets have also been less than convinced. The yield, or effective interest rate, on British government bonds – partly a measure of investors' expectations of future interest rates – has risen rather than fallen since the Bank's announcement. That is partly because the latest data suggests the economic outlook is improving, but rapidly rising bond yields can be worrying because they tend to push up borrowing costs right across the economy. Carney, though, has insisted he is not concerned.
Meanwhile the pound has risen almost 4% against the dollar since Carney took the helm – again signalling markets expect rates to rise sooner than the Bank is indicating. Last week sterling hit a nine-month high, although it came off that peak as investors began to question if the UK's recovery could continue at its current pace.
"I don't think in practice forward guidance is very successful," says Jamie Dannhauser of Lombard Street Research. He believes Carney has failed to convince the City he means business, because he has failed to back up forward guidance with action, such as the promise of a fresh round of quantitative easing – the Bank scheme that has pumped £375bn of freshly minted money into the economy.
"[Forward guidance] doesn't work if you're not willing to take on the markets if you don't get your way," says Dannhauser.
David Blanchflower, a former member of the MPC, is more blunt: "He looks already, within a hundred days, to have lost control. Bond yields are rising, the pound is rising like mad, and they've got no response."
He argues that the hedged nature of the new policy is likely to reflect "horse-trading" between Carney and his fellow MPC members. Unlike in Canada, where what the central bank governor says goes, decision-making on the MPC is by vote. With a recovery now under way, its various members are known to have differing views on what are the most pressing risks to the economy.
Another former MPC member said: "Had I been on the MPC I would have let him do it [forward guidance], because I don't think it does any particular harm; but I don't think it does much good either."
It's not just the Bank's approach to monetary policy that has changed on Carney's watch. When outgoing deputy governor Paul Tucker, who missed out on the top job, leaves for the US later this month, it will mark the latest in a number of personnel changes that are starting to make Carney's Bank look quite different from Lord (Mervyn) King's.
Blue-blooded banker Charlotte Hogg joined as the Bank's new chief operating officer, a post that didn't exist under the old regime, on the same day as Carney. Meanwhile Tucker will be replaced by former Treasury and Foreign Office apparatchik Sir Jon Cunliffe. With long-serving deputy governor Charlie Bean due to leave early in 2014, Carney will be given another opportunity to bring in a new broom.
Insiders say the atmosphere in the Bank's Threadneedle Street headquarters has already changed. Carney is often seen eating lunch in the canteen or showing visitors around. His approach is less hierarchical than that of King, who was derided as the "Sun King", by former chancellor Alistair Darling – though Carney is said to be no keener on intellectual dissent than his predecessor.
He will need all the allies he can get both inside and outside the Bank, if he is to deal successfully with what many analysts see as the greatest threat facing the economy: the risk that an unsustainable bubble is starting to inflate in Britain's boom-bust housing market.
Carney and his colleagues on the Bank's Financial Policy Committee (FPC), the group tasked with preventing future crashes which partly overlaps with the MPC, have new powers to rein in mortgage lending if they believe a bubble is emerging, and the governor has said he won't hesitate to use them.
But the FPC is untested and largely unknown to the public, and bubbles are notoriously hard to spot. Using the FPC's influence to choke off the supply of high loan-to-value mortgages, for example, would be hugely controversial at a time when large numbers of would-be buyers have been frozen out of the market. Meanwhile, the government's extension of the Help to Buy scheme, with details to be laid out on Tuesday, is likely to increase the demand for property, potentially pushing up prices.
Van Reenen warns that if property prices do take off, Carney could find himself in an unenviable position. "We have this terrible problem in this country that house prices have got completely out of kilter with incomes. I would be very reluctant to see interest rates start pushing up. Using other methods, such as being tougher on Help to Buy, and trying to do things through prudential regulation is better – but the fundamental thing is lack of houses, and Carney can't do anything about that."
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