"When the yen falls this much, even the Japanese bond market is unsettled," said Tohru Yamamoto, chief fixed income strategist at Daiwa Securities. The 10-year JGB yield rose 3.5 basis points to 0.690 percent, its highest level since September 30. Ten-year JGB futures fell 0.29 point in price to 143.85. The latest rise in JGB yields has led some market players to speculate the bull run may soon peter out.
The yield has risen more than 10 basis points from a six-month low of 0.580 percent hit in November after having constantly fallen in July-November as the Bank of Japan bought more than 7 trillion yen of JGBs per month. The BoJ's purchases, amounting to 70 percent of new JGB issuance by the government, are reducing the outstanding JGBs available in the market.
Yet, the yen's latest slide has raised the prospect that the Japanese economy and inflation could grow faster than many investors believe, which theoretically reduces the BOJ's need for further easing. The yen fell to 103.925 yen per dollar, its lowest level since the global financial crisis in 2008, boosting Japanese shares to the detriment of low-yielding JGBs.
While the BoJ's massive bond buying has made JGBs less sensitive to moves in US bond yields in recent months, traders cannot ignore a rise in US yields, which tends to encourage Japanese investors to buy US bonds instead of domestic ones. US bond yields rose near three-month highs hit just after a solid payroll report on Friday, as more investors grew worried that the Fed could announce a reduction in its bond buying at its policy meeting on December 17-18. Although tapering from early next year is seen as a more likely scenario, traders agree that bond markets worldwide will be under pressure at least until the Fed's policy announcement.