Argentina’s Former President Cristina Fernández de Kirchner said she will run as vice president in October’s elections, surprising her followers and prompting some sighs of relief from nervous investors. Former cabinet chief Alberto Fernández, a longtime operative, will take top spot on the ticket as the presidential candidate competing against President Mauricio Macri. Cristina Fernández, a divisive figure in the third-biggest economy in Latin America, announced the move at the weekend…