Altria Group Inc . MO.N fell 50 cents , or 1.2 percent , to $ 41.81 .
Altria Group Inc . MO.N fell 50 cents , or 1.2 percent , to $ 41.81 .
The best-performing stock was Altria Group Inc . , which rose more than 27 percent to close at $ 42.31 a share .