OP Bancorp

The securities portfolio is the second largest component of our interest earning assets, and the structure and composition of this portfolio is important to an analysis of our financial condition. The portfolio serves the following purposes: (i) it provides a source of pledged assets for securing certain deposits and borrowed funds, as may be required by law or by specific agreement with a depositor or lender; (ii) it provides liquidity to even out cash flows from the loan and deposit activities of customers; (iii) it can be used as an interest rate risk management tool, because it provides a large base of assets, the maturity and interest rate characteristics of which can be changed more readily than the loan portfolio to better match changes in the deposit base and our other funding sources; and (iv) it is an alternative interest-earning use of funds when loan demand is weak or when deposits grow more rapidly than loans.

We classify our debt securities as either AFS or held-to-maturity at the time of purchase. Accounting guidance requires AFS debt securities to be marked to fair value with an offset to accumulated other comprehensive income (loss), a component of shareholders’ equity. Monthly adjustments are made to reflect changes in the fair value of our available-for-sale securities.

The following table summarizes the fair value of the AFS debt securities portfolio as of the dates presented:

(1)Credit ratings are independent assessments of the credit quality of debt securities. The Company determines the credit rating of a debt security based on the lowest rating assigned by any of the nationally recognized statistical rating organizations (“NRSROs”) that have rated the security. Investment grade debt securities are those rated BBB- or higher (as defined by NRSROs), and are generally considered by the rating agencies and market participants to represent low credit risk. Ratings percentages are presented based on fair value.

AFS debt securities increased by $14.9 million, or 8%, to $200.8 million as of September 30, 2025 from December 31, 2024. This increase was primarily due to a $29.6 million of purchases in residential collateralized mortgage obligations during the third quarter of 2025 and a $6.9 million reduction in unrealized losses for the nine months ended September 30, 2025, partially offset by $21.7 million in paydowns of residential mortgage-backed securities and collateralized mortgage obligations.

Certain securities have fair values less than amortized cost and, therefore, contain unrealized losses. The unrealized losses were primarily attributable to interest rate movement, not credit quality. These securities (Fannie Mae, Ginnie Mae, and Freddie Mac) are guaranteed or sponsored by agencies of the U.S. government, and the issuers of the securities are of high credit quality. We believe that the net unrealized losses presented in the previous tables are temporary and no credit losses are expected. As a result, we expect full collection of the carrying amount of these securities, do not intend to sell the securities in an unrealized loss position, and believe it is more-likely-than-not we will not have to sell these securities prior to recovery of amortized cost. Accordingly, for AFS debt securities, we did not have allowance for credit losses as of September 30, 2025 and December 31, 2024.

The following table sets forth certain information regarding contractual maturities and the weighted average yields of our investment securities as of the dates presented. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties.