The dollar was on track for its best performance in seven years on Friday, having been buoyed by the Federal Reserve's aggressive monetary policy tightening and concerns about the global growth outlook. The U.S. dollar index, which measures the greenback against a basket of currencies, has surged more than 8 per cent this year, the most since 2015. It was last 0.05 per cent lower at 103.93. The Fed has raised rates by a total of 425 basis points since March to curb surging inflation, a move that has kept the dollar in bid for most of the year. But expectations that the central bank may not have to raise rates as high ... (full story)