Refer to the graph shown, which depicts a perfectly competitive firm. When maximizing profit, the firm represented will earn per-unit profit roughly equal to: 
Definitions:
Bond Swap
A strategy that involves selling one bond and using the proceeds to purchase another bond, typically to improve yield or extend maturity.
Yield To Maturity
The total return anticipated on a bond if held until it matures, including all interest payments and the repayment of principal.
Bond's Value
The present worth of a bond's future interest payments and its repayment of principal at maturity, adjusted for current market interest rates.
9-Year Duration
A metric indicating the sensitivity of a bond's price to changes in interest rates, represented here as the bond having an average response over a nine-year period.
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