Mumbai, Aug. 22 -- The dollar index is ramping up gains on Friday ahead of Federal Reserve (Fed) Chair Jerome Powell's speech later today at Jackson Hole for further clarity on Fed's interest rate stance. Federal Reserve Bank of Chicago President Austan Goolsbee said late Thursday that September's Fed meeting remains open for action. He said while some recent inflation readings have come in better than expected, he hopes one "dangerous" data point is just a blip. However, Cleveland Fed President Beth Hammack noted that it's important to maintain a modestly restrictive policy to lower inflation, adding that he does not see an imminent case for cutting rates based on current data. Meanwhile, data yesterday showed US Composite PMI climbed to...