Under ASC 320, debt securities classification and measurement work off a single decision made at acquisition: you place each debt security into one of three categories based on your intent and ability, and that category then controls how the security is carried on the balance sheet, where unrealized gains and losses appear, and how credit losses are recognized. The three categories are held-to-maturity, trading, and available-for-sale. Get the classification right at day one and the rest of the accounting follows a defined path.
What ASC 320 Covers
ASC 320 applies to investments in debt securities: U.S. Treasury bonds, corporate bonds, municipal securities, mortgage-backed securities, and similar instruments that represent a creditor relationship with a stated maturity and a fixed or determinable payment schedule.
Several things sit outside the standard. Loans receivable that the entity originated are not covered. Neither are investments accounted for under the equity method, investments that result in consolidation, or most derivatives. Equity securities also no longer belong here. After ASU 2016-01, marketable equity investments moved to ASC 321, and the available-for-sale category for equities was eliminated entirely. If you are holding stock rather than debt, ASC 320 is not your standard.
Two measurement concepts run through everything that follows. Fair value is the price a security would fetch in an orderly transaction between market participants. Amortized cost is the original purchase price, adjusted over the security’s life for the amortization of any premium or discount using the effective interest method, which produces a constant yield.
The Three Classification Categories
Every debt security must land in one of three buckets at acquisition. The choice is driven by why you bought the security and whether you can hold it.
Held-to-Maturity
Held-to-maturity (HTM) is reserved for debt securities you have both the positive intent and the demonstrated ability to hold until the stated maturity date. It is the most restrictive category. You cannot classify a security as HTM if you anticipate selling it in response to interest rate changes, liquidity needs, shifts in funding sources, or changes in foreign currency risk. Convertible debt securities cannot be classified as HTM at all, because the conversion feature means principal may not be collected at maturity in the traditional sense.
Trading
Trading securities are debt instruments bought with the intent of selling them in the near term to profit from short-term price movements. This is the natural home for broker-dealers and active trading desks. The test is purpose: if the security is held principally for near-term sale, it belongs here.
Available-for-Sale
Available-for-sale (AFS) is the default for debt securities that do not fit into either HTM or trading. These may be held indefinitely and sold in response to interest rate changes, liquidity needs, or other management decisions. In practice, most corporate debt portfolios sit here.
How Each Category Is Measured
The classification decision determines the balance sheet carrying amount and where changes in value show up on the financial statements.
HTM
HTM securities are carried at amortized cost. Because the entity intends to collect contractual cash flows through maturity, temporary market swings from interest rate movements are irrelevant to the reported value. Interest income is recognized using the effective interest method. Unrealized gains and losses from market fluctuations are not recognized in either net income or other comprehensive income, though public companies must disclose fair value and gross unrecognized holding gains and losses in the footnotes.
Trading
Trading securities are carried at fair value, with all changes in fair value recognized immediately in net income as unrealized holding gains or losses. Interest income is also recognized in net income as earned. This treatment produces the most volatile earnings impact of the three categories, which matches the economic reality of a portfolio managed for short-term profit.
AFS
AFS securities are carried at fair value on the balance sheet, but unrealized gains and losses bypass the income statement and are reported in other comprehensive income (OCI), a separate component of stockholders’ equity. Financial statement users see a current fair value on the balance sheet without letting routine market movements distort reported earnings. When an AFS security is sold, the cumulative unrealized gain or loss sitting in accumulated other comprehensive income (AOCI) is reclassified into net income as a realized gain or loss. Interest income is recognized in net income as earned, the same as for HTM.
What Happens If You Sell an HTM Security
Selling or transferring an HTM security before maturity carries consequences that extend well beyond the single security involved. Because the HTM classification rests on the entity’s stated intent to hold to maturity, one sale calls into question whether the entity genuinely intended to hold any of its HTM securities. A sale or transfer that does not fit within a recognized exception is a “tainting event,” and the fallout is severe: all remaining HTM securities should be reclassified to AFS, and the entity is effectively barred from using the HTM category until it has reestablished the credibility of its classification policy. The generally accepted taint period is about two years.
The standard carves out specific exceptions where a sale does not trigger tainting:
- A significant deterioration in the issuer’s creditworthiness, such as a published rating downgrade.
- A change in tax law that eliminates or reduces the tax-exempt status of the security’s interest. A change in marginal tax rates alone does not qualify.
- A major business combination or disposition that requires a sale to maintain the entity’s interest rate or credit risk position.
- A regulatory change that modifies what constitutes a permissible investment or imposes higher capital requirements, forcing the sale.
- A sale close enough to the maturity or probable call date (for example, within three months) that interest rate risk is no longer a meaningful pricing factor. These can be treated as maturities for classification purposes.
Beyond these enumerated exceptions, other events may avoid tainting if they are isolated, nonrecurring, unusual for the entity, and could not have been reasonably anticipated. All four conditions must be met, and auditors tend to scrutinize these claims closely.
Transferring Securities Between Categories
Entities may move debt securities between categories when circumstances change, but the accounting at the transfer date depends on the direction.
A transfer from HTM to AFS is recorded at fair value, with the unrealized gain or loss reported in AOCI. This move raises the tainting question, so entities rarely make it voluntarily. A transfer from AFS to HTM uses a different approach: the security’s fair value at the transfer date becomes the new amortized cost basis, and any unrealized gain or loss previously sitting in AOCI effectively creates a new premium or discount that is amortized over the remaining life as a yield adjustment. Transfers into or out of the trading category are always recorded at fair value, with any unrealized gain or loss at the transfer date recognized immediately in net income.
For all transfers, any existing allowance for credit losses on the security being transferred is reversed through earnings on the transfer date. The entity then reassesses whether a new allowance is needed under the model that applies to the security’s new category.
Credit Losses Under CECL
Expected credit losses on debt securities are governed by the Current Expected Credit Loss (CECL) model in ASC 326. CECL replaced the older “incurred loss” approach with a forward-looking model that requires entities to estimate lifetime expected credit losses at the time a financial asset is acquired. The mechanics differ by category.
HTM Securities
For HTM debt securities, the entity records an allowance for credit losses equal to the full lifetime expected credit loss. The allowance reduces the security’s net carrying amount on the balance sheet and creates a credit loss expense in net income. It is reassessed each reporting period, and improvements in expected cash flows can result in a reversal of previously recognized losses. Disclosures are presented by major security type.
AFS Securities
AFS debt securities follow a different path. Impairment is assessed on an individual security basis rather than by pool. When the fair value of an AFS security falls below its amortized cost, the entity must determine whether the decline is due to credit factors or non-credit factors like interest rate movements. The credit-related portion is recognized through an allowance for credit losses, with the expense hitting net income. The non-credit-related portion stays in OCI. One important limit: the credit loss recognized through the allowance cannot exceed the difference between amortized cost and fair value.
If the entity intends to sell the security, or if it is more likely than not that the entity will be required to sell before recovery, the entire decline to fair value is written down through earnings rather than using the allowance approach. This “intent to sell” trigger is where the AFS credit loss model diverges sharply from the HTM model.
Balance Sheet Presentation and Disclosures
Entities must present financial assets separately by measurement category on the balance sheet or in the footnotes. Fair-value securities (trading and AFS) should be displayed separately from amortized-cost securities (HTM), either through separate line items or through parenthetical disclosure.
On a classified balance sheet, individual debt securities are classified as current or noncurrent based on maturity dates and the entity’s reasonable expectations about sales and redemptions. Securities expected to convert to cash within one year (or the normal operating cycle) are current. HTM securities are inherently long-term unless they mature within one year. Trading securities are almost always current.
Footnote disclosures are extensive. For AFS securities, entities disclose the amortized cost basis, aggregate fair value, and gross unrealized holding gains and losses by major security type. For HTM securities, disclosures include amortized cost basis, net carrying amount after any allowance for credit losses, and the total allowance by major security type. Public companies also disclose aggregate fair value and gross unrecognized holding gains and losses for HTM portfolios.
Financial institutions must present contractual maturities using at least four groupings: within one year, after one year through five years, after five years through ten years, and after ten years. Other entities may combine maturities in appropriate groupings. Additional required disclosures cover proceeds and gross realized gains and losses on AFS sales, the change in net unrealized holding gains or losses reported in OCI and the amounts reclassified into net income, the carrying amount and gain or loss on any HTM sales or transfers along with the reason, and a rollforward of the allowance for credit losses by major HTM security type.
Where Equity Securities Now Live
If you are trying to classify an equity investment, ASC 320 will not answer the question. Equity securities with a readily determinable fair value are carried at fair value under ASC 321, with all changes flowing through net income. There is no OCI buffer for equities, and the AFS category for equity securities no longer exists. The only pieces of an equity investment that route away from ASC 321 are those that qualify for equity method accounting, those that result in consolidation, and equity securities for which the entity has elected the ASC 321 measurement alternative for investments without a readily determinable fair value.