Twitter's share price fell 13% in after-hours trading before bouncing back on Wednesday. It had already hit an all-time low this week.
Javid, the business secretary, said getting rid of the rule would lead to higher prices for UK consumers of steel. Photograph: Rex/Shutterstock.
Twitter's average monthly active users stalled in the fourth quarter - the first flat quarter sequentially since the company listed in 2013.
London's top flight saw its gains limited as the US Federal Reserve warned it could slow the pace of future US interest rate rises.
UK interest rates will remain on hold until the end of the decade, according to investors, who believe there is now even a one-in-two chance that the Bank of England will instead cut rates this year.