Securities & Investments
Available-for-Sale Securities
Also known as AFS Securities
Available-for-sale (AFS) securities are bonds a bank may sell before maturity for liquidity or balance-sheet management. They are carried at fair value, and their unrealized gains and losses flow through accumulated other comprehensive income (AOCI) into equity.
How is Available-for-Sale Securities calculated?
Unlike HTM, AFS securities are marked to market each period. The difference between amortized cost and fair value is the unrealized gain or loss, which is recorded in AOCI rather than net income (Schedule RC-B and the equity section of Schedule RC).
Why does Available-for-Sale Securities matter?
AFS securities are a bank's liquidity reserve, but because they are marked to market through AOCI, rising rates push their value down and drag reported equity with it. The largest banks must also flow AFS losses into regulatory capital, making AFS the channel through which rate moves hit the capital base.
How do you interpret Available-for-Sale Securities?
Read the AFS balance with its unrealized loss and the bank's AOCI election. A bank holding a big AFS book in a high-rate environment is carrying a live mark-to-market drag on equity that an HTM-heavy peer can hide.
What do Available-for-Sale Securities levels indicate?
| Range | Label | Interpretation |
|---|---|---|
| Liquid, modest mark | Strong | Healthy liquidity buffer with limited unrealized loss. |
| Normal | Adequate | Typical AFS holdings; manageable AOCI impact. |
| Large unrealized loss | Watch | Mark-to-market losses meaningfully denting equity. |
| Loss straining capital | Concern | AFS losses materially eroding tangible equity or regulatory capital. |
Worked example
Frequently asked
Why do AFS losses matter if the bonds aren't sold?
AFS securities are marked to fair value through AOCI, so an unrealized loss reduces book equity immediately. If the bank later needs liquidity and sells, the loss becomes realized and hits net income.
What is the AOCI opt-out?
Every bank except Category I and II banking organizations (the US G-SIBs and firms with $700 billion or more in assets or $75 billion or more in cross-jurisdictional activity) may make a one-time election to exclude most AOCI from regulatory capital, insulating its capital ratios from AFS mark-to-market swings. Category I and II firms cannot opt out.
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