US economists largely expect the Fed to leave rates unchanged this time, but see the risk of a hike as significant, with many pricing in a rate rise for September. Inflation has been stuck above the Fed's 2% target for more than five years. New Fed Chair Kevin Warsh told Congress earlier this month that he had "no tolerance'' for elevated inflation. Fed watchers James Egelhof and Guneet Dhingra at BNP Paribas Securities say "policymakers' patience with high and persistent inflation is broadly exhausted, meaning there is a significant risk'' of a rate hike in September. Overall, more than 30% of Wall Street traders predict that the Fed will raise rates this week, while 76% foresee a rate hike in September, according to the CME FedWatch tool.