Pandora shares have regained half the value that was lost following reports that Apple was planning a move into streaming internet radio.

Initial reports in the Wall Street Journal on September 6 suggested that Apple could soon announce something along the lines of 'iRadio' making a big step into the streaming world but positioning itself opposite the likes of Pandora rather than Spotify.

The news sent Pandora shares tumbling as much as 20.8% the following day with the company’s shares ...