CAF to reduce stake in Mexican FFSS January 3, 2012 | Latin America News Spain-based railway company Construcciones y Auxiliar de Ferrocarriles (CAF) will reduce its stake in Mexico-based Ferrocarriles Suburbanos (FFSS) from the current 83 per cent to 43 per cent. &n... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password