Share markets and the dollar on Wednesday offered a guarded welcome to the latest signs of progress in U.S.-China trade talks, while awaiting more detail of what was decided and whether it would stick for long.

One expert said he expected loosened controls on U.S. exports of semiconductors in exchange for China's releasing of more rare earths.

Global stocks climbed on Monday while the dollar retreated as talks began in London between the US and China, aimed at cooling a trade dispute between the world’s two largest economies. The dispute has expanded beyond tit-for-tat tariffs to restrictions over rare earths,