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Issuing bonds at discount - computing effective interest rate
Yes, the "effective" and "market" rates are interchangeable. The present value formula will help make it possible to determine the effective interest rate. Since the bond's par value, duration, and par interest rate is known, the coupon payment can be extracted. Now, knowing the price the bond sold in the market, the duration, and the coupon payment, the effective market interest rate can be extracted.  This involves solving large polynomials. A less accurate way of determining the interest rate is using a yield shorthand. To extract the market interest rate with good precision and acceptable accuracy, the annual coupon derived can be divided by the market price of the bond.