Accounting for Financial Instruments: Three Measurement Approaches
Financial instruments (bonds, stocks) held as assets are measured using one of three approaches: amortized cost (for hold-to-maturity debt), fair value through OCI (for available-for-sale debt), or fair value through P&L (for trading instruments). Each produces different income statement and balance sheet outcomes, though total comprehensive income remains constant.
Scope and Core Concepts
Financial Instruments as Assets
The video focuses on financial instruments appearing on the asset side of the balance sheet, such as purchased bonds and equity investments. Derivatives are excluded because they are typically reported at fair value and can swing between asset and liability status depending on whether their value is positive or negative for the holder.
Two Measurement Bases
Financial instruments are measured either at amortized cost (primarily for debt securities) or at fair value. Fair value measurement has two sub-approaches: changes can flow through OCI (other comprehensive income) or through P&L (profit and loss). The choice depends on the company's business model and intent for holding the instrument.
Effective Interest Rate (Yield to Maturity)
In accounting, the effective interest rate is the instrument's original yield to maturity. This rate is critical for amortized cost measurement and is used across all three approaches to compute interest income, even for zero-coupon bonds where no cash interest is paid.
Amortized Cost Approach
Constant Yield Price Trajectory
Under amortized cost, the carrying amount follows a predetermined path from initial purchase price to face value at maturity. Each year, the asset grows by the effective interest rate applied to the previous year's carrying amount, regardless of actual market price fluctuations.
Numerical Example: Zero-Coupon Bond
A three-year zero-coupon bond purchased at €751 with a €1,000 face value has a yield to maturity of 10%. Under amortized cost, the carrying amount grows by 10% annually: €751 → €826 (year 1) → €909 (year 2) → €1,000 (year 3), regardless of market prices of €835 and €890 in years 1 and 2.
Interest Income Recognition
Interest income is recognized annually based on the effective interest rate applied to the previous carrying amount. For the example bond: €75 (year 1), €83 (year 2), €91 (year 3), totaling €249—the difference between purchase price and face value.
Balance Sheet and Equity Impact
All interest income flows through P&L and increases retained earnings by the same amount. Because both assets and equity increase by the same amount each year, the balance sheet remains balanced. The company reports predictable income regardless of market price changes.
When to Apply Amortized Cost
Under US GAAP, use amortized cost for debt securities held to maturity. Under IFRS, apply it when the business model is to hold the asset to maturity and collect contractual cash flows (principal and interest) on scheduled dates. The instrument must have determinable payment dates.
Cost Model for Unquoted Equities
A variant of amortized cost is the cost model, used for unquoted (unlisted) equity investments where fair value cannot be reliably measured. The asset remains on the balance sheet at initial purchase cost with no subsequent adjustment, common for private equity and venture capital holdings.
Fair Value Through OCI Approach
Dual Income Recognition
Under fair value through OCI, the asset is measured at current market value on the balance sheet. However, income is split: interest income (based on the effective rate, as if using amortized cost) flows through P&L, while the difference between fair value change and interest income is recorded as an unrealized gain or loss in OCI.
Numerical Example: Year 1 Fair Value Through OCI
The bond's market price rises to €835 (gain of €84). Interest income of €75 is reported in P&L. The remaining €9 (€84 − €75) is recorded as an unrealized fair value gain in OCI. Total comprehensive income is €84; equity increases by €84 but is split between retained earnings (€75) and accumulated OCI gains (€9).
Year 2: Negative OCI Adjustment
The bond's market price rises to €890 (gain of €55). Interest income remains €83 (from amortized cost logic). Since €83 exceeds the €55 total gain, OCI records a negative €28 unrealized loss. Accumulated OCI swings from +€9 to −€19, reflecting that the bond is trading below its constant-yield trajectory value of €909.
Year 3: OCI Reversal
The bond reaches €1,000 at maturity (gain of €110). Interest income is €91. OCI records a positive €19 gain, which reverses the accumulated OCI balance from −€19 to €0. All temporary fair value differences clear by maturity.
OCI Accumulation and Reclassification
OCI gains and losses do not flow to retained earnings and cannot be used to pay dividends. They accumulate in a separate equity line (e.g., accumulated OCI gains/losses). If the asset is sold before maturity, the accumulated OCI balance is reclassified to P&L at that time.
When to Apply Fair Value Through OCI
Under US GAAP, use this for available-for-sale debt securities—instruments held but not committed to maturity. Under IFRS, apply it when the business model is to collect interest and principal AND potentially sell the asset before maturity. It can also apply to equities if designated at initial recognition.
Real-World Example: Deutsche Bank
Deutsche Bank's 2024 financial statements show financial assets at fair value through OCI. Their consolidated statement of comprehensive income separately discloses unrealized gains and losses on these instruments, and their statement of changes in equity shows how OCI movements affect total equity.
Fair Value Through P&L Approach
Full Fair Value Volatility in Income
Under fair value through P&L, the asset is measured at market value on the balance sheet, and all changes in fair value—both interest income and unrealized gains/losses—flow through the income statement. There is no OCI buffer; all fair value movements directly impact reported profit.
Numerical Example: Year 1 Fair Value Through P&L
The bond's market price rises to €835 (gain of €84). The full €84 is reported in P&L, split into €75 interest income and €9 unrealized gain. Equity increases by €84 entirely through retained earnings, with no OCI component.
Year 2: Reduced P&L Impact
The bond's market price rises to €890 (gain of €55). Interest income is €83, but unrealized loss is €28, resulting in net P&L of €55. This is significantly lower than the €83 that would be reported under fair value through OCI, creating income volatility and unpredictability.
Year 3 and Total Income
Year 3 records €110 in P&L (€91 interest + €19 unrealized gain). Across all three years, total interest income is €249 (€75 + €83 + €91), identical to other approaches. However, unrealized gains and losses sum to zero, confirming that fair value through P&L simply accelerates all movements into the income statement.
When to Apply Fair Value Through P&L
This is the default approach for equity investments, especially listed shares. For debt securities, it applies to trading instruments held for short-term profit from price changes rather than to collect coupons and principal. Unquoted equities with unreliable fair value can be measured at cost as an exception.
Comparative Summary
Interest Income Consistency Across Approaches
All three approaches report the same total interest income of €249 over the three-year period (€75 + €83 + €91). This reflects the constant-yield trajectory inherent in the effective interest rate calculation, which is applied regardless of measurement method.
Total Comprehensive Income Alignment
Total comprehensive income (P&L plus OCI) is identical across all three approaches: €84 (year 1), €55 (year 2), €110 (year 3). The difference lies in how this income is split between P&L and OCI, and whether the asset is shown at amortized cost or fair value on the balance sheet.
Balance Sheet Presentation Differences
Amortized cost shows the asset at €826, €909, €1,000 (following the yield trajectory). Fair value through OCI and fair value through P&L both show €835, €890, €1,000 (current market prices). Only amortized cost diverges from market value during the holding period.
P&L Volatility Trade-off
Amortized cost and fair value through OCI provide predictable P&L (€75, €83, €91 and €75, €83, €91 respectively), useful for forecasting. Fair value through P&L creates volatile P&L (€84, €55, €110) that reflects market price swings, making income less predictable but balance sheet more current.
Notable quotes
In reality this is one of the most complicated topics in accounting. — Instructor
You set out a predetermined path for going from the initial 751 all the way to that predicted 1,000 at the end of year three. — Instructor
If you intend to sell this asset in the market, why should we bother with this 890? We intend to hold it until maturity. — Instructor