(Bloomberg) -- Hidden beneath convulsions in the global bond and currency market is an emerging sense of caution about the possibility the Bank of Japan may tweak yield-curve control policy at the end of July.Most Read from BloombergSingapore Minister Faces Most Serious Graft Probe Since 1986DeSantis Says No Thanks to $377 Million in US Energy FundsInflation at 3% Flags End of Emergency, Turning Point for FedGoldman Breaks Its Own Rule to Flag Results Much Worse Than RivalsShopify Shames Employe