The computing giant is currently valued at £3.3trn (£2.6trn) - just ahead of its closest rivals Nvidia and Apple. It comes as tech companies battle over artificial intelligence products.
Court filings show that the short video app and its Chinese owner are bidding to strike down a new national security law on several grounds, including the apparent singling out of its US interests and 170 million users.
Sky's Ed Conway explains how party promises on housebuilding might actually seem more achievable, given a better measure that paints a rosier picture for progress.
Sky's Ian King says the long-awaited interest rate cut by the Bank of England is on track in the coming months but there are several factors that could hold back the move borrowers are so desperate for.
The decision comes despite official figures yesterday which revealed inflation had fallen to the Bank's target of 2% for the first time in nearly three years.
Once owned by the financier Guy Hands, Four Seasons has hired the property agent CBRE to handle an auction of its 46 remaining freehold sites, Sky News understands.