Credit rating firm Fitch joined rival Moody's MCO.N in suspending its commercial operations in Russia. By Byron Kaye and Jamie Freed March 8 (Reuters) - Morgan Stanley MS.N urged the U.S. Federal Reserve on Tuesday to take a more cautious approach to raising interest rates as Russia's invasion of Ukraine spurs already sky-rocketing global inflation. "You can't throw boldness on top of uncertainty," James Gorman, Chairman and CEO of Morgan Stanley, told a conference hosted by the Australian Financial Review (AFR) newspaper.