In the Proto-Baltic language, the stress could be placed on any syllable, the stress was free, unfixed. According to the movement of stress, three possible variants of accent system are reconstructed: 1) a system with baritone accentuation (stress on the stem) and oxytonic accentuation (stress on the endings), 2) a system with baritone accentuation and mobile accentuation (stress moves from endings to the stem), 3) a system with the baritone, mobile and oxytonic accentuations.
