Twitter reports $645m loss for 2013

The loss was expected by analysts, who highlighted Twitter's revenues, which rose 110% last year to reach $665m, the BBC reports. But a reported slow growth in user numbers was a bigger concern for investors. Twitter averaged 241 million monthly users in the last quarter of the year, up just 3.8% on the previous quarter. That represents a slowdown compared with a growth rate of 10% seen at the beginning of 2013. Timeline views were down nearly 7%, suggesting users were refreshing their feeds less often. Shares fell as much as 12% in after-hours trading on Wednesday.