Loans
Loan balances decreased to $10.2 billion as of December 31, 2023 compared to $10.3 billion and $10.7 billion as of September 30, 2023 and December 31, 2022, respectively. Loan fundings totaled $339 million, offset by loan payments and payoffs of $444 million, in the quarter. Loan fundings totaled $1.5 billion, offset by loan payments and payoffs of $2.1 billion, for the year ended December 31, 2023. Commercial and industrial (“C&I”) loans accounted for 91% of total fundings for the quarter, and 90% of total fundings for the twelve months ended December 31, 2023. C&I loans consist primarily of commercial revolving lines of credit and term loans.
Loan portfolio average yield was 4.70% in the fourth quarter of 2023 compared to 4.73% in the prior quarter and 4.34% in the fourth quarter of 2022. Average yields on new loan fundings were 8.47% in the fourth quarter of 2023 compared to 8.35% in the prior quarter and 5.72% in the fourth quarter of 2022.
Investment Securities
Investment securities were $1.5 billion as of December 31, 2023, compared to $1.6 billion as of September 30, 2023, and $1.1 billion as of December 31, 2022. During the quarter, $175 million in GNMA mortgage-backed securities were sold, resulting in a net gain on sale of securities available-for-sale of $2.3 million.
The allowance for credit losses for investments was $8.2 million for the fourth quarter of 2023, compared to $8.5 million for the prior quarter and $11.4 million for the fourth quarter of 2022. Unrealized losses (tax-effected) on the available-for-sale portfolio decreased to $15.2 million as of December 31, 2023, compared to $18.8 million as of September 30, 2023. Unrecognized losses (tax-effected) on the held-to-maturity portfolio decreased to $56.3 million as of December 31, 2023, compared to $75.2 million as of September 30, 2023. Combined unrealized losses (tax-effected) on the available-for-sale and held-to-maturity portfolios decreased to $71.5 million, or 4.76% of the combined portfolios as of December 31, 2023, compared to $94.0 million or 5.76% of the combined portfolios as of September 30, 2023.
Investment securities portfolio average yield increased to 3.84% in the fourth quarter of 2023 compared to 3.24% in the prior quarter and 2.38% in the fourth quarter of 2022.
Deposits and Borrowings
Deposits were $10.7 billion as of December 31, 2023, compared to $10.8 billion and $10.4 billion as of September 30, 2023, and December 31, 2022, respectively. Noninterest-bearing demand deposits accounted for 14% of total deposits as of December 31, 2023, compared to 22% and 26% as of September 30, 2023 and December 31, 2022, respectively. Certificates of deposit accounted for 29% of total deposits as of December 31, 2023, compared to 28% and 18% as of September 30, 2023 and December 31, 2022, respectively. Core deposits accounted for 60% of total deposits as of December 31, 2023, compared to 68% and 87% as of September 30, 2023 and December 31, 2022, respectively. Brokered deposits accounted for 40% of total deposits as of December 31, 2023, compared to 32% and 13% as of September 30, 2023 and December 31, 2022, respectively.
Cost of deposits increased to 3.41% for the fourth quarter of 2023 compared to 3.03% for the prior quarter and 1.47% for the fourth quarter of 2022.
Insured and collateralized deposits accounted for approximately 87% of total deposits as of December 31, 2023, unchanged from the prior quarter.