U.S. stocks were mixed as investors digested a spate of concerns abroad and awaited signals of progress in U.S.-China trade talks.

Asian stocks struggled on Friday to track Wall Street's exuberance about a possible U.S. rate cut next month as anxiety over Sino-U.S. trade negotiations clouded the investor mood in the region.

Bitcoin soared to the highest level in a year, extending a run that's seen prices more than double since March.

Whilst the markets saw some positivity yesterday with all 3 main indexes closing higher, concerns still grow on further trade tension between China and the US.

The ride-hailing giant is set to price its long-anticipated IPO on Thursday, with shares on track to begin trading on the New York Stock Exchange on Friday.

The earnings extravaganza continues on Wednesday with reports from heavyweights Boeing before the opening bell and Facebook, Microsoft and Tesla after the closing bell.

Japan's Nikkei edged lower on Tuesday morning as investors awaited full-year earnings reports, while Sony jumped after Reuters reported that U.S. hedge fund Third Point was again building a stake in the company to push for changes.

The dollar edged higher on Wednesday and antipodean currencies beat a hasty retreat after the Reserve Bank of New Zealand surprised the markets by opening the door to future monetary policy easing.

Gold prices rose for a third consecutive session on Tuesday as the dollar weakened on expectations that the U.S. Federal Reserve will maintain a dovish tone at its monetary policy meeting this week.

The pound jumped and Asian shares rallied on Tuesday after the European Commission agreed to changes in a Brexit deal ahead of a vote in the British parliament on a divorce agreement.