ðə dˈɪfɹəns bᵻtwˌiːn bˈɑːks spɹˈɛdz ænd ɡˈʌvɚnmənt sᵻkjˈʊɹɹᵻɾiz wɪl tˈɛnd tʊ ɪŋkɹˈiːs wɛn ðɛɹ ɪz faɪnˈænʃəl ɪnstəbˈɪlᵻɾi, ˈɪŋkɹiːs æz ˈɪntɹɛst ɹˈeɪts ɹˈaɪz, ænd ˈɪŋkɹiːs fɔːɹ ʃˈɔːɹɾɚ mətʃˈʊɹɹᵻɾiz.
The difference between box spreads and government securities will tend to increase when there is financial instability, increase as interest rates rise, and increase for shorter maturities.