Library/CFA (Chartered Financial Analyst)/FIXED INCOME: CFA® Program Curriculum, 2026 • Level I • Volume 6/Learning Module 8 Yield and Yield Spread Measures for Floating-Rate Instruments

Learning Module 8 Yield and Yield Spread Measures for Floating-Rate Instruments

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FRN pricing and discount margin5 min
Floating-rate instruments (FRNs) pay interest equal to a market reference rate (MRR) plus a quoted margin (QM). The required margin, or discount margin (DM), is the spread investors require and determines whether a floater trades at par, premium, or discount at reset. A simplified FRN pricing model for N periods and periodicity m is PV = sum_{k=1..N}[(MRR + QM)*FV/m / (1 + (MRR + DM)/m)^{k}] + FV/(1 + (MRR + DM)/m)^{N}. If DM > QM the instrument trades at a discount; if DM < QM it trades at a premium; if DM = QM it trades at par. DM can be solved from market price using numeric methods. For zero-coupon or stripped instruments periodicity is arbitrary; periodicity conversions use (1+APR_m/m)^m = (1+APR_n/n)^n.

Key Points

  • Quoted margin (QM) is fixed on documentation; discount margin (DM) is market-required spread.
  • Use FRN pricing formula to solve for DM from PV when QM and MRR known.
  • If DM > QM floater priced at discount; DM = QM at par; DM < QM at premium.
  • Periodicity conversions preserve effective annual return using (1+APR/m)^m identity.
Money market quote conventions and conversions5 min
Money market instruments have original maturities of one year or less and are quoted either on a discount rate (DR) basis or add-on rate (AOR) basis. DR pricing: PV = FV (1 - (Days/Year)DR). This understates investor return because DR uses FV in the denominator. Add-on pricing: PV = FV/(1 + (Days/Year)AOR). Convert DR to bond-equivalent yields (AOR on 365-day basis) for comparability: AOR = (365/Days)(FV - PV)/PV. Bond equivalent yield (BEY) is an add-on 365-day rate used to compare money market instruments. When comparing instruments, convert to the same day-count convention and periodicity before computing spreads (e.g., G-spread or I-spread).

Key Points

  • Discount-rate quotes use FV in denominator and understate true investor return.
  • Add-on quotes express interest on invested principal; PV = FV/(1 + Days/Year * AOR).
  • Convert discount quotes to BEY (365-day AOR) to compare across instruments.
  • Always align day-count and periodicity before computing yield spreads.
Duration of floaters, PVBP, and practical comparisons5 min
Floating-rate duration equals fraction of period until next reset: MacDur_FRN = (T - t)/T, with typical short durations (often less than six months). Money duration and PVBP extend duration into currency units: MoneyDur = AnnModDur * PVFull; PVBP = (PV- - PV+)/2 for 1 bp moves. Use money convexity adjustments for larger moves. When comparing securities or building portfolios, convert yields and yields’ periodicity to common basis; account for quoted vs required margin differences for FRNs, and for discount vs add-on conventions for money market instruments. Use numerical solvers for DM and PVBP where closed forms are impractical.

Key Points

  • FRN Macaulay duration equals time to next reset fraction; very low compared to fixed-rate bonds.
  • Money duration (currency) = AnnModDur * PVFull; PVBP approximates 1 bp price change.
  • For large yield moves include convexity/money-convexity adjustments.
  • Practical valuation often uses spreadsheet solvers (e.g., Excel RATE, PV, YIELD, SOLVER).

Questions

Question 1

An FRN pays a 3-month MRR plus a quoted margin of 150 bps. On the reset date the market requires a discount margin of 165 bps. All else equal, the FRN will be priced at:

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Question 2

Using the simplified FRN pricing model PV = sum[(MRR + QM)*FV/m / (1 + (MRR + DM)/m)^{k}] + FV/(1 + (MRR + DM)/m)^{N}, which variable is solved for when market price, QM, and current MRR are known?

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Question 3

A two-year zero-coupon bond is priced at 95.00 with annual compounding. What is the annual yield-to-maturity?

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Question 4

A 90-day Treasury bill is quoted on a 360-day discount rate basis at 0.120%. Its price per 100 of face value is closest to:

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Question 5

Convert a money market discount rate quote of 0.55% on a 90-day instrument (360-day year) to the bond-equivalent add-on yield using a 365-day basis. The BEY is closest to:

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Question 6

A bank CD is quoted on an add-on 365-day basis at 0.12% for 90 days. If the issuance principal is 20,000,000, the redemption amount is closest to:

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Question 7

Which of the following best explains why a money market discount rate understates investor yield relative to an equivalent add-on yield?

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Question 8

An FRN has QM = 75 bps, MRR = 1.10%, FV = 100, semiannual payments (m=2), N=8, and market PV = 95.50. Which margin is implied by the market price?

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Question 9

If two FRNs have identical QM and MRR but one resets quarterly and the other semiannually, which will typically have the lower Macaulay duration just after a reset?

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Question 10

Which conversion formula converts an APR with periodicity m to an APR with periodicity n?

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Question 11

An analyst observes a commercial paper quoted on a 360-day discount basis at 4.33% for 180 days. What is the approximate bond-equivalent add-on yield on a 365-day basis?

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Question 12

A 365-day CD is quoted as an add-on rate of 0.12% and purchased for 20,000,000. If sold after 45 days in a market where 45-day add-on quotes are 0.06%, what is the sale price approximate? (Use AOR formula PV = FV / (1 + Days/Year * AOR) and assume FV from initial issuance.)

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Question 13

Which money market quote basis typically uses FV as the quoted amount and therefore understates the investor return if DR > 0?

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Question 14

A 3-year FRN pays quarterly and was issued at par with QM = 50 bps. If investor-required DM falls to 30 bps on reset, the floater will trade at:

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Question 15

Which of the following is the correct pricing equation for a money market instrument quoted on a discount basis?

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Question 16

A 3-month commercial paper is quoted at a 0.100% discount rate with a 360-day year. Convert this into an approximate 365-day add-on (BEY).

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Question 17

Which day-count convention is commonly used for corporate bond yields and often converted to actual/actual for government-equivalent yields?

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Question 18

A corporate bond uses a 30/360 day count and has a stated semiannual YTM of 3.2% (periodicity 2). To compare with a quarterly bond (periodicity 4), which conversion approach is correct?

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Question 19

Which statement best describes a bond equivalent yield (BEY) for money market instruments?

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Question 20

A floater is reset quarterly. If today is 57 days after the prior reset and the coupon period is 90 days, what is its Macaulay duration expressed in fraction of years (period fraction)?

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Question 21

An analyst wants to compare two short-term instruments: one quoted on DR (360-day) and one on AOR (365-day). What is the correct first step to compare yields?

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Question 22

Which of the following best describes the meaning of an implied forward rate IFR_{A,B-A} derived from spot rates ZA and ZB?

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Question 23

Given spot rates Z1=1.00%, Z2=1.50%, Z3=2.00% (annual, effective), what is the implied 2-year forward rate one year from now (1y2y)?

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Question 24

Which of these statements is true about spot, par, and forward curves when the spot curve is upward sloping?

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Question 25

A 3-month commercial paper has DR quoted at 0.12% (360-day). If an investor wants to know the effective annual (periodicity=1) rate, which formula should she use?

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Question 26

Which of the following is true about a floater issued at par with QM equal to the market's DM at issuance?

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Question 27

In practice, how is the discount margin for an FRN typically obtained from market data?

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Question 28

A 180-day T-bill quoted at a discount rate of 4.78% (360-day) yields a BEY of 4.965%. Which step is NOT part of converting DR to BEY?

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Question 29

You observe a 6-month bank CD with add-on quote AOR365 = 6.218% and a 6-month T-bill BEY = 4.36%. Which instrument likely has higher credit risk?

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Question 30

Which of the following best describes why FRNs have low interest rate risk compared to fixed-rate bonds?

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Question 31

A 20-year strip (zero) priced at 69.43 has an effective annual YTM of 1.8410%. What is the semiannual bond-equivalent yield (APR2) approximately?

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Question 32

Which formula isolates the discount rate DR from PV and FV for a money market instrument?

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Question 33

A floater with QM 140 bps and market-implied DM 128 bps will trade on the next reset at:

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Question 34

Which day-count is commonly used for government bonds in many jurisdictions as described in the chapter?

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Question 35

Why do analysts convert money market discount quotes to bond-equivalent yield when comparing with other securities?

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Question 36

Which spread compares a bond's yield to an interpolated government benchmark yield with the same maturity?

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Question 37

An analyst has a 4% annual-coupon 3-year bond priced using spot rates. To compute the par rate for 3 years, which condition is applied?

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Question 38

Why are on-the-run government bonds often observed to trade at slightly lower yields than off-the-run issues?

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Question 39

An analyst prices a 3-year corporate bond and obtains a Z-spread of 82 bps using government spot curve. What does Z-spread represent?

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Question 40

If a money market instrument is quoted with an add-on rate of 4.45% for 180 days on a 365-day basis, what is the price for PV per 100 of face value?

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Question 41

What is the primary reason investors track G-spreads historically for a corporate bond?

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Question 42

Which of the following is NOT true about converting a corporate yield from 30/360 to actual/actual government-equivalent yield?

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Question 43

An FRN with QM fixed at issuance is priced well below par between resets. Which of the following explanations is most consistent with that observation?

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Question 44

If a 3-year money market instrument has been quoted at DR360 = 3.48% but an analyst prefers to compare using semiannual bond basis (periodicity 2), what is the general approach?

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Question 45

Which of the following is a key practical limitation when using the simplified FRN pricing model given in the chapter?

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Question 46

Which quote type is most common for commercial paper and Treasury bills in many markets?

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Question 47

An analyst uses the simplified FRN pricing model and gets DM = 3.29% at PV=97 for a four-year quarterly FRN. Which of these is the best interpretation?

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Question 48

Which of the following best explains why floating-rate instruments are often used by banks to fund floating-rate loans?

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Question 49

An investor comparing two FRNs with same QM but different quoted periodicities should:

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Question 50

Which spreadsheet functions are commonly recommended by the chapter to compute yields, PV, and solve for discount margin or other unknowns?

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