LONDON (Reuters) – Norway and Sweden have joined the ranks of central banks opting for 50 basis-point interest rate rises, delivering their biggest policy tightening moves in two decades. June saw the U.S. Federal Reserve upping rates by 75 basis points and the Swiss National Bank surprise with a half-point hike. That means the Bank of Japan is the only major developed world central bank still chanting the inflation-is-transitory mantra. Here’s a look at where policymakers stand in the race to contain inflation. 1) UNITED STATES The Federal Reserve vaulted to the top-hawk spot on June 15, rais…