Item 3. Quantitative and Qualitative Disclosures About Market Risk
Item 3. Quantitative and Qualitative Disclosures About Market Risk
We are subject to market risks from changes in interest rates charged on our credit facilities and other variable rate indebtedness. The impact on earnings and the value of our long-term debt are subject to change as a result of movements in market rates and prices. As of March 31, 2022, 62.0%, or $2.4 billion, of our long-term debt had a weighted average fixed interest rate of 3.93%. As of March 31, 2022, we had $1.5 billion of long-term variable rate debt, at a weighted average interest rate of 2.76%.
In the normal course of business, we enter into certain interest rate cap agreements with major financial institutions to manage our risk above certain interest rates on variable rate debt. As of March 31, 2022, $1.2 billion, or 32.1%, of our long-term debt is variable rate debt subject to interest rate cap agreements, at a weighted-average interest rate of 2.81%, and $226.9 million, or 5.9%, of our long-term debt is variable rate debt not subject to any interest rate cap agreements. Approximately 91% of our outstanding variable rate debt is indexed to LIBOR and approximately 9% of our outstanding variable rate debt is indexed to the Secured Overnight Financing Rate ("SOFR"), and accordingly our annual interest expense related to variable rate debt is directly affected by movements in LIBOR or SOFR. After consideration of hedging instruments currently in place, increases in LIBOR and SOFR of 100, 200, and 500 basis points would have resulted in additional annual interest expense of $14.9 million, $29.9 million, and $59.2 million, respectively. Certain of our variable rate debt instruments include springing provisions that obligate us to acquire additional interest rate caps in the event that LIBOR or SOFR increases above certain levels, and the implementation of those provisions would result in additional mitigation of interest costs.
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