Twitter disappoints investors as user growth hits wall

Twitter Inc reported its first quarter with no growth in users since it went public, stoking fresh concerns on how long it will take for the company to reverse the trend. The stalled growth in the average number of active monthly users came despite a series of changes to make Twitter easier and more engaging. While the company said it is taking additional steps - including launching changes to the timeline of tweets earlier Wednesday - it told investors not to expect immediate results.