In the tidy world of finance theory, mean-variance efficiency guides rational investors to build optimal portfolios: maximise return for each unit of risk. But as global events remind us daily, the ...

President Donald Trump is hosting Bahrain's crown prince and Qatar's prime minister at the White House. The meetings focused on strengthening diplomatic and economic ties with the Gulf region. Bahrain ...

Israel launched strikes in the Syrian capital, Damascus, followed by a ceasefire announcement, but it was unclear if it would hold ...

The yen slid 0.4% to 148.48 to the dollar, trimming a 0.7% advance in the previous session. The Japanese currency weakened 0.3% to 172.51 per euro, after touching 173.24 on Wednesday, the weakest ...