Exactly one week after Valentine's Day, beleaguered real estate investment trust (REIT) Medical Properties Trust (MPW 5.56%) earned a little love on the stock market. Investors pushed the company's share price up by more than 5%, topping the S&P 500 index's marginal gain, following the release of quarterly and full-year results. A flip into negative revenue, but a beat on profitability In its fourth quarter, Medical Properties Trust posted negative revenue of $122 million, quite a shift from the year-ago po ...