Answer:
The coupon rate on the bond must be 6.98%
Step-by-step explanation:
Yield to maturity is the annual rate of return that an investor receives if a bond bond is held until the maturity.
Face value = F = $1,000
Selling price = P = $910
Number of payment = n = 19 years
Bond Yield = 7.8%
The coupon rate can be calculated using following formula
Yield to maturity = [ C + ( F - P ) / n ] / [ (F + P ) / 2 ]
7.8% = [ C + ( $1,000 - $910 ) / 19 ] / [ ( $1,000 + $910 ) / 2 ]
7.8% = [ C + $4.74 ] / $955
7.8% x $955 = C + $4.74
$74.49 = C + $4.74
C = $74.49 - $4.74 = $69.75
Coupon rate = 69.75$ / $1,000 = 0.06975 = 6.975%