<prompt> Translate the following text to EnglishKiwango cha discount kutumika kwa ajili ya hesabu ni wastani wa riba toleo juu ya biashara Treasury dhamana ya maturity sawa na dhamana ya mkopo, kutumika kwa wakati ambapo mikopo dhamana ni disbursed.  <response>: The discount rate used for the calculation is the average interest rate yield on marketable Treasury securities of similar maturity to the loan guarantees, applicable to the time when the guaranteed loans are disbursed. 