MGM Mirage ( MGM), battered by concerns that an economic slowdown will cut demand for gambling, announced a large buyback of its beaten down stock Wednesday The move is perhaps best explained by the Rolling Stones: You can't always get what you want. But if you try sometimes, you get what you need. Lately, casino stocks have been horrible performers, as investors unload consumer-discretionary names amid increasing signs of a slowing economy. MGM shares plunged nearly 25% in the past month, falling below their "theoretical bottom" of $84 and leaving investors and analysts puzzled. Dubai World, the investing arm of the Dubai government, had purchased a 4.9% initial stake in the company last year for $84, and in December bought another $424 million of stock in a private transaction for $84.80. "There is a bid there at $84, but they're not getting it," one surprised buyside analyst who invests in the casino space told TheStreet.com earlier this week, when MGM shares were sliding down to $70. The buyback now provides a new theoretical bottom. MGM and Dubai World said they are jointly making a cash Dutch tender offer for up to 10 million shares of MGM stock for between $75 and $80. The offer represents nearly 8.3% of MGM's float. Kirk Kerkorian's investment firm Tracinda Corp., which owns 52% of the company's stock, said it will not tender any of its shares.