Item 3. Quantitative and Qualitative Disclosures About Market Risk
ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Our floating rate debt under the 2022 credit facility exposes us to interest rate risk. Interest rate risk results when the maturity or repricing intervals of interest-earning assets and interest-bearing liabilities are different. A change in the Federal Funds Rate, or the reference rate set by Bank of America, N.A., would affect the rate at which we could borrow funds under the credit facility. The balance outstanding under our credit facility at September 30, 2023 was $394.7 million, of which $269.7 million is subject to rate risk. If market rates were to increase or decrease 100 basis points from the levels at September 30, 2023, interest expense would increase or decrease approximately $2.7 million annually.
We do not engage in trading market risk sensitive instruments. We periodically use interest rate swaps to manage interest rate risk exposure. The interest rate swaps effectively modify our exposure to interest rate risk, primarily through converting portions of our floating rate debt under the credit facility to a fixed rate basis. These agreements involve the receipt or payment of floating rate amounts in exchange for fixed rate interest payments over the life of the agreements without an exchange of the underlying principal amounts.
At September 30, 2023, we had four interest rate swaps with notional values, fixed rates of interest and expiration dates of (i) $50.0 million - 0.834% - April, 2025, (ii) $30.0 million - 1.186% - December, 2026, (iii) $20.0 million - 2.450% - August, 2027 and (iv) $25.0 million - 3.669% - April, 2028, respectively. Management will continue to evaluate the potential use of interest rate swaps as we deem appropriate under certain operating and market conditions. We do not enter into derivative instruments for trading or speculative purposes.
In connection with the services provided by our payroll operations, funds collected from our clients’ accounts in advance are segregated and may be invested in short-term investments, such as corporate and municipal bonds. In accordance with our investment policy, all investments carry an investment grade rating at the time of the initial acquisition, and are classified as available-for-sale securities. At each respective balance sheet date, these investments are adjusted to fair value with fair value adjustments being recorded to other comprehensive income or loss and reflected in the accompanying Condensed Consolidated Statements of Comprehensive Income for the respective period. If an investment is deemed to be other-than-temporarily impaired due to credit loss, then the adjustment is recorded to "Other (expense) income, net" in the accompanying Condensed Consolidated Statements of Comprehensive Income. Refer to Note 6, Financial Instruments, and Note 7, Fair Value Measurements, to the accompanying unaudited condensed consolidated financial statements for further discussion regarding these investments and the related fair value assessments.
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