By , (Reuters) - Twitter Inc’s stock tumbled over 6% on Monday after its move to permanently suspend U.S. President Donald Trump’s widely-followed account spurred concern among investors over the future regulation of social networks.The San Francisco-based social media company said on Friday its suspension of Trump’s account, which had 88 million followers, was due to the risk of further violence following the storming of the U.S. Capitol last week.The move drew criticism from some Republicans for quelling the president’s right to free speech, while European Union Commissioner Thierry...…By , (Reuters) - Twitter Inc’s stock tumbled over 6% on Monday after its move to permanently suspend U.S. President Donald Trump’s widely-followed account spurred concern among investors over the future regulation of social networks.The San Francisco-based social media company said on Friday its suspension of Trump’s account, which had 88 million followers, was due to the risk of further violence following the storming of the U.S. Capitol last week.The move drew criticism from some Republicans for quelling the president’s right to free speech, while European Union Commissioner Thierry...WW…