interface AMParams {
    principal: number;
    rate: number;
    period: number;
    yearOrMonth: "year" | "month";
    payAtBeginning: boolean;
}
/**
 * Amortization is the paying off of debt with a fixed repayment schedule in regular installments over a period of time.
 *
 * @see http://www.investopedia.com/terms/a/amortization.asp
 */
export declare function AM({ principal, rate, period, yearOrMonth, payAtBeginning, }: AMParams): number;
export {};