shares of diversified holding company vector group ltd plunged following the companys spinoff of residential brokerage douglas elliman inc at 1140 am et shares of vector group slid 3619 to 1096 a share vector group said it will continue to operate its tobacco business which includes subsidiaries liggett group llc and vector tobacco inc and continue to own interests in properties and real estate projects through new valley llc at 1134 am et shares of douglas elliman gained 73 to 1073 the stock opened at 10 per share and traded as high as 1266 a share earlier in the day