Japan’s blue-chip Nikkei stock index closed 6 per cent higher, with Treasury Secretary Scott Bessent tasked with leading trade negotiations with Tokyo. Photograph: Kiyoshi Ota/Bloomberg World markets won a reprieve on Tuesday after three days of heavy selling that wiped trillions of dollars off the value of shares, but the mood was cautious with a focus on whether Washington might negotiate on some of its aggressive tariffs. Asia stocks bounced off 1½ year lows, European shares opened broadly higher and US stock futures pointed to a positive open for Wall Street where shares fell to their lowest in over a…