RETAINED EARNINGS are profits of the business that have not been paid out to the owners as of the balance sheet date. The earnings have been "retained" for use in the business (Retained Earnings is an account in the equity section of the balance sheet). It is comprised of the balance, either debit or credit, of appropriated or unappropriated earnings of an entity that are retained in the business. A good rate of growth in retained earnings is an indicator that the firm enjoys a sustainable competitive advantage. NOTE: Appropriated earnings are not available for dividends, but may be used to reduce a deficit or may be transferred to stated capital. Other appropriations of profits require a vote of the shareholders.
NEGATIVE CASH FLOW is where expenditures required to maintain an investment exceed income received on the investment, i.e. spending in a business is greater than earnings.
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.
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