Shares in Twitter drop after slower than expected growth
30 April 2014 Last updated at 09:50 BST
Shares in Twitter dropped to their lowest levels since the company's stock market flotation, as it reported slower than expected user growth.
The social media site - famous for making people think in 140 characters or less - continued to make money from advertising and raised its outlook for the rest of the year.
But Twitter has yet to make a profit.
Twitter says it made a net loss of $132m (£78m) in the first three months of 2014.
However, it posted quarterly revenue of $250m - $226m of which was made through advertising.
Michelle Fleury reports from New York