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Analysis: Why the Fed might welcome a bond market tantrum
FILE PHOTO: The Federal Reserve in Washington · Reuters

By Stefano Rebaudo

(Reuters) - A bond market tantrum that drives up yields can be a fearsome prospect for central banks but the U.S. Federal Reserve might just welcome a sell-off that lifts Treasury yields towards levels that better reflect the robust state of the economy.

Persistently low yields are a feature of bond markets across the developed world, with central banks mostly in no hurry to raise interest rates and a global savings glut that keeps debt securities in constant demand.

But it is in the United States that the contradiction between economic recovery and bond yields is starkest.

Even with growth tipped to surpass 6% this year and a "taper" in sight for the Fed's bond-buying programme at the end of this year, 10-year yields are still stuck at just above 1.3%..

The Fed probably rejoiced at low yields in the initial stages of the economic recovery, but now needs bonds to respond to the end of pandemic-linked recession, said Padhraic Garvey, head of research for the Americas at ING Bank.

Current pricing, analysts say, looks more consistent with heightened economic uncertainty, whereas higher yields would align markets more with the signals coming from central banks.

"To facilitate that, we argue that there needs to be a tantrum. If the Fed has a taper announcement ... and there is no tantrum at all, that in fact is a problem for the Fed," ING's Garvey said.

Analysts say a bond market tantrum would involve yields rising 75-100 basis points (bps) within a couple of months.

The original "taper tantrum" in 2013 boosted U.S. yields just over 100 bps in the four months after then Fed boss Ben Bernanke hinted at an unwinding of stimulus measures.

But that kind of sudden jump in yields looks unlikely right now, given how clearly the Fed has telegraphed its plans to taper its bond-buying. And as 2013 showed, bond market tantrums carry nasty side-effects including equity sell-offs and higher borrowing costs worldwide.

A happy medium, analysts say, might be for benchmark yields to rise 30-40 bps to 1.6-1.8%.

2013 taper tantrum https://fingfx.thomsonreuters.com/gfx/mkt/klpykgdynpg/Pasted%20image%201631870959827.png

FED AND BANKS NEED AMMUNITION

Besides wanting higher yields to better reflect the pace of economic growth, the Fed also needs to recoup some ammunition to counter future economic reversals.

The Fed funds rate - the overnight rate which guides U.S. borrowing costs - is at zero to 0.25%, and U.S. policymakers, unlike the Bank of Japan and the European Central Bank, are disinclined to take interest rates negative.