MGM Mirage (MGM) shares were halted at $6.18 yesterday afternoon and have since rallied 50 percent to $9.30 on news Dubai World and CityCenter Lenders have agreed on the completion of CityCenter. (Link to story). In the options market, there seemed to be little anticipation of the good news, as volume was running at typical levels and it seems that May and June 7.5 call sellers were leading the order flow.