January 3: The tariffs of metropolitan buses, trains and subways in Buenos Aires are increased.
January 4: Union leader Marcelo Balcedo, accused of money laundering, is detained in Uruguay, in a joint operation between the Interpol and the Uruguayan police.
Police officer Luis Chocobar is indicted by the judiciary, accused of murder, for shooting a thief who attempted to kill a tourist. President Macri receives him at the Casa Rosada, giving him his full support.
Former president Cristina Fernández de Kirchner is indicted for allegedly obstructing investigation into the 1994 AMIA Bombing which killed 85 people, allegedly making a deal with the Iranian government to stop investigating Iranian officials involved in the attack in exchange for better prices on Iranian oil.