Twitter shares drop 10% as revenue outlook disappoints

Twitter shares drop 10% as revenue outlook disappoints

Revenue for the first quarter of 2019 is now expected to be between $715m and $775m, below analysts' forecasts.

Twitter also warned that its operating costs could rise 20% in 2019.

The share fall came despite the company reporting profits of $255m (£197m) for the final quarter of 2018, more than double the $91m profit it made a year earlier, as advertising revenues grew.