Twitter's stock hit an all-time low earlier this week after shares slumped 5.6 percent to $29.27. That pushed Twitter's
market value below $20 billion, making it a potential acquisition target for companies like Google
. However, analysts believe it will have to fall a further $10 billion for those tech giants to seriously consider any kind of approach. Twitter hit an all time high of over $70 in December 2013, two months after it went public.