Likewise fragility is defined as a concave sensitivity to stressors, leading to a negative sensitivity to increase in volatility. The relation between fragility, convexity, and sensitivity to disorder is mathematical, obtained by theorem, not derived from empirical data mining or some historical narrative. It is a priori.
unearned interest. Amount deducted as advance interest from a loaned sum. This amount is recorded as a liability in the books of the lending institution, and is gradually decreased as it is recognized as earned income over the life of the loan. Also called unearned discount.
Accrued interest. In finance, accrued interest is the interest on a bond or loan that has accumulated since the principal investment, or since the previous coupon payment if there has been one already. For a financial instrument such as a bond, interest is calculated and paid in set intervals (for instance annually or semi-annually).