* E-mail: MichaelToriyama2024@u.northwestern.edu, jeff.snyder@northwestern.edu tributing factor towards band inversion in systems such as SnTe and rock-salt SnSe. Third and most importantly, the conditions under which band inversion prompts warping effects are not fully understood. In rock-salts, we found that the valence and conduction bands must be sufficiently inverted at the L-point to achieve high valley degeneracy; whether this is the only necessary condition for generating multiple valleys has not yet been clarified.