Olivier Blanchard, chief economist of the IMF says that as government borrowing around the world surges, interest rates will go up. Governments borrow by selling bonds to investors, and to attract investors the government competes with stock and corporate bond markets for investor's money, leading to rising yields for investors. As the confidence has returned to corporate bond markets this is already happening. From the end of 2008. the yield on the benchmark 10 year Treasury note has increased by one and ahalf percentage points, rising to 3.54% from 2%, the sharpest upward movement in 15 years. In Germany the yield on German 10 year bonds has also risen, rising to 3.57% from 2.93%. Similiarly British bond yields have risen to 3.78% from 3.41%. Congressional Budget Office estimates are that net government debt for the USA will rise to 65% of GDP at the end of fiscal 2010, from 41% at the end of fiscal 2008. In 2009 and 2010 the US government will sell $5 trillion in new debt, according to Citigroup. A decade from now the government's outstanding debt could equal 82% of GDP, or about $17 trillion. Every one point rise in interest rates costs the Treasury $50 billion annually over a few years, and Kenneth Rogoff estimates that this could reach $170 billion annually if the average yield on 10 year Treasury note goes up to 4.7%, as the Congressional Budget Office estimates. This will dampen the effects of stimulus spending. It is a big issue says Rogoff. A year ago under old policy and assumptions before the financial crisis the Congressional Budget Office projected outstanding debt at $5.3 trillion in 10 years. Now the estimate is $17 trillion, which is triple the old number and an increase of $11 trillion. A recovering economy would make these numbers less relevant. But with struggling industries like autos and banks needing more help from the government, and with consumers having to reduce a mountain of debt, a weak economy for a long time and small growth for a decade would make this a story that won't go away. Rogoff says its like what happened to the subprime borrowers, people assuming that the funding is always going to be there. In 2009 and 2010 Citigroup says, the Euro zone countries will sell nearly 1.6 trillion euros or $2.6 trillion in new debt, and Britain will offer 490 billion pounds or $799 billion in new debt. Over the next decade this would slow Europe's recovery and prolong the downturn. Britain faces a bigger problem in the near term as Britain's governmetn debt equals 55% of GDP, and Standard and Poors estimates it could approach 100% by 2013. South America and Eastern Europe will also face the situation of rising rates. Asian countries like China with lower levels of debt are in a better situation, IMF's Blanchard says....