Socialist Workers' Current
Socialist Workers' Current is a far-left Trotskyist political organisation in Brazil, created in 1992 by a split of the Socialist Convergence. CST is an active tendency of the Socialism and Liberty Party and the Brazilian section of the International Workers' Unity – Fourth International. CST split from Worker's Party when its federal deputy Babá was expelled from PT, after voting against the pension reform proposed by ex-president Lula.
Among the largest currents in PSOL, CST is the most leftist tendency.