Twitter (TWTR) Up On Takeover Chatter

Twitter (TWTR) is nearing a new 52-week high thanks to "take-over" chatter. According to some analysts, Twitter's worth twice its current value. If true, then I don't understand why the TWTR closed yesterday (02015.04.08) at only $52.30. 52-week range: $29.51 - $55.99.