The yen is still trading around its weakest in 38 years, largely as a function of the wide gap between U.S. and Japanese interest rates that make it highly profitable for traders to borrow in yen to fund holdings in dollar assets that offer more attractive returns. The dollar fell as much as 1% to a one-month low of 157.30 yen, and was last at 158.1 yen. The euro was last down 0.3% at 172.04 yen. The yen jumped against the dollar on Friday, with traders on high alert for signs of fresh intervention by authorities, after a surge in the Japanese currency on Thursday that was likely the result of official buying. Is Japan startijng to do better that the United States