Loans and money issues

In its simplest form, a bond is a financial obligation of an entity that promises to pay a specified sum of money at specified future dates. The entity that promises to make the payment is called the bond issuer and is referred to as the borrower. Bond issuers include central governments, municipal/provincial governments, supranational (e.g., the World Bank), and corporations. The investor who purchases bond is said to be the lender or creditor. The promised payments that the bond issuer agrees to make at the specified dates consist of two components: interest payments and repayment of the amount borrowed.
Prior to the 1980s, bonds were simple investment vehicles. Holding aside default by the bond issuer, the investor knew how much interest would be received periodically and when the amount borrowed would be repaid. Moreover, most investors purchased bonds with the intent of holding them to their maturity date. Beginning in the 1980s, the bond world changed. First, bond structures became more complex. There are features in many bonds that make it difficult to determine when the amount borrowed will be repaid. For some bonds it is difficult to project the amount of interest that will be received periodically. Second, the hold-to-maturity investor has been replaced by the institutional investor who actively trades bonds. These new product design features in bonds and the shift in trading strategies have lead to the increased use of the mathematical techniques.

Non-interest-bearing current liabilities such as accounts payable and accrued expenses are subtracted to calculate net operating working capital. The reason for subtracting these liabilities is to achieve consistency with the definition of NOPLAT. The implicit financing costs associated with these liabilities are included in the expenses that are deducted in calculating NOPLAT. For example, the implicit interest that companies incur when they pay their bills for goods or services in 30 days rather than paying on delivery is included in the cost of goods sold. By subtracting the non-interest- bearing liabilities in calculating capital, we achieve consistency with NOPLAT. Alternatively, we could add back the estimated financing cost associated with non-interest-bearing liabilities and not subtract the liabilities from capital. This approach adds considerable complexity without providing any additional insight into the economics of the business.
Any interest-bearing current liabilities, such as short-term debt and the current maturities of long-term debt, are not subtracted from operating invested capital since the financing cost associated with these liabilities is explicitly excluded from the NOPLAT calculation.