The soaring budget deficit in the US has done little to put international investors off treasuries, with the dollar's weak exchange rate making returns increasingly attractive.According to figures from the Treasury Department, domestic demand for treasuries has also been supported by a higher savings rate and persistent concerns about the prospects for economic recovery.Wan-Chon Kung, who helps oversee $89 billion as a portfolio manager in Minneapolis at FAF Advisors, a unit of US Bancorp, told Bloomberg: "The US continues to provide one of the deepest and most liquid markets available for investing."The Treasury data showed that the value of treasuries held by foreign investors rose for the fourth consecutive quarter in the three months to September, with holdings now standing at a record $3.45 trillion.Despite being the second worst performer in currency trading last week, Daily FX has issued a bullish forecast for the greenback this week as risk appetites are sated.