City Office REIT (CIO) shares soared 24.1% in the last trading session to close at $6.9. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 3.5% gain over the past four weeks.The increased investor optimism in the stock can be attributed to the recent announcement from City Office of entering into a definitive merger agreement with MCME Carell Holdings, LP and MCME Carell Holdings, LLC, under which MCME Carell will acquire all of th ...