ACCOUNTING TERMS - ACCOUNTING DICTIONARY - ACCOUNTING GLOSSARY
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CAPITAL MAINTENANCE contains two concepts, a financial concept and a physical concept. Most entities adopt a financial concept of capital maintenance. Under this concept a profit is earned only if the monetary amount of net assets at the end of the period, excluding distributions/contributions to/from owners, exceeds the monetary amount of net assets at the beginning of the period. Financial capital maintenance is usually measured in monetary units; however, the requirement to report the impact of hyperinflation results in the measurement of assets and liabilities in monetary units of constant purchasing power.
CONVEXITY is the price change that occurs for a bond not accounted for or predicted by modified dU1"ation. Convexity explains why price change estimates using modified duration increase in error as the yield changes, generally by more than 100 basis points. Bonds with positive (negative) convexity have increased (decreased) duration as interest rates fall (rise). Bonds with positive convexity, such as those with put options, have returns higher than those predicted by duration alone. Mortgage-backed securities and callable bonds generally have negative convexity, which means that the price increase predicted by duration for a steep rate decline is too high.