This Exam FM sample reference tests Bond Valuation. Prospective book values after coupons six and seven are linear in coupon rate r; setting the discount accumulation BV₇ − BV₆ to 4.36 gives r = 4.29%, choice C.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
AChoice A is inconsistent with the adjacent discount-book-value recursion; no distinct standard single-step error producing it is identifiable.
BChoice B is inconsistent with the adjacent discount-book-value recursion; no distinct standard single-step error producing it is identifiable.
DChoice D is inconsistent with the adjacent discount-book-value recursion; no distinct standard single-step error producing it is identifiable.
EChoice E is inconsistent with the adjacent discount-book-value recursion; no distinct standard single-step error producing it is identifiable.
Original practice · fully worked
Original variant: coupon inferred from discount accretion
Immediately after coupon 6, a par-redemption bond has book value 940. Its periodic yield is 5%. The book value immediately after coupon 7 is 950. Determine the coupon paid at coupon 7.
A 30
B 35
C 37
D 40
E 47
Variant answer in brief
The recursion 950 = 940(1.05) − C gives coupon C = 37, choice C.
Setup
Setup
Book value first earns the periodic yield and then falls by the coupon paid.
BV7=BV6(1+i)−C
Model
Model
Insert the two adjacent post-coupon values into the one-period recursion.
950=940(1.05)−C
Compute
Compute
Effective interest is 47, while book value rises by 10; the difference is a coupon of 37.
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