The article discusses the function of early termination of the Parliamentary term consisting of searching for the most effective Parliamentary majority. It was presented in the light of regulations adopted in constitutional law of Ukraine. A mark of lack of positive majority is usually the inability of the Parliament to create the new government. The Constitution of Ukraine provides one more criterion. There was introduced, characteristic only for this state, the institution of legal forcing to create the institutionalized coalition of fractions of deputies covering most of the constitutional composition of the Parliament, under threat of dissolving it by President. The author analyses the effectiveness of this solution in the systemic practice of Ukraine.