Senior unsecured notes (including Medium-Term Note Program)
As of June 30, 2020, we had $13.5 billion in senior unsecured notes outstanding. As of December 31, 2019, we had $12.4 billion in senior unsecured notes outstanding.
During the six months ended June 30, 2020, we issued $2.3 billion in aggregate principal amount of Medium-Term Notes comprised of (i) $750.0 million due 2025 at a fixed rate of 2.30%, (ii) $650.0 million due 2030 at a fixed rate of 3.00% and (iii) $850.0 million due 2025 at a fixed rate of 3.375%.
During the quarter ended June 30, 2020, we repurchased $185.2 million in aggregate principal amount of Floating Rate Medium-Term Notes due 2021. The open market debt repurchases resulted in a gain of $13.6 million and is included in Aircraft sales, trading and other revenue in our Consolidated Income Statements.
Unsecured revolving credit facility
As of June 30, 2020, we did not have amounts outstanding under the Revolving Credit Facility. The total amount outstanding under the Revolving Credit Facility was $20.0 million as of December 31, 2019.
We have an unsecured revolving credit facility with JPMorgan Chase Bank, N.A., as agent (the “Revolving Credit Facility”). During the six months ended June 30, 2020, we increased the aggregate capacity of our unsecured revolving credit facility by $250.0 million. On May 5, 2020, commitments totaling $92.7 million of our committed unsecured revolving credit facility matured. As of June 30, 2020, the aggregate capacity of our committed unsecured revolving credit facility was approximately $6.0 billion. Lenders hold revolving commitments totaling approximately $5.5 billion that mature on May 5, 2023, commitments totaling $245.0 million that mature on May 5, 2022 and commitments totaling $5.0 million that mature on May 5, 2021.
As of June 30, 2020, borrowings under our committed unsecured revolving credit facility will generally bear interest at either (a) LIBOR plus a margin of 1.05% per year or (b) an alternative base rate plus a margin of 0.05% per year, subject, in each case, to increases or decreases based on declines in the credit ratings for our debt. We are required to pay a facility fee of 0.20% per year (also subject to increases or decreases based on declines in the credit ratings for our debt) in respect of total commitments under our unsecured revolving credit facility. Borrowings under our committed unsecured revolving credit facility are used to finance our working capital needs in the ordinary course of business and for other general corporate purposes.
Secured debt financing
In June 2020, we entered into an amendment to our secured warehouse facility to extend the final maturity to June 2021. The facility will continue to bear a floating interest rate of LIBOR plus 2.00%. As part of the amendment, the credit facility was converted to full recourse against us and excess cash collateral was released. The outstanding balance on our secured warehouse facility was $103.1 million and $128.5 million as of June 30, 2020 and December 31, 2019, respectively.
As of June 30, 2020, the outstanding balance on our secured debt financings, including our secured warehouse facility and our export credit financing, was $326.8 million and we had pledged 12 aircraft as collateral with a net book value of $644.5 million. As of December 31, 2019, the outstanding balance on our secured debt financings, including our secured warehouse facility and our export credit financing, was $460.4 million and we had pledged 15 aircraft as collateral with a net book value of $890.7 million.
Preferred equity
On March 5, 2019, we issued 10,000,000 shares of 6.150% Fixed-to-Floating Non-Cumulative Perpetual Preferred Stock, Series A (the “Series A Preferred Stock”), $0.01 par value, with a liquidation preference of $25.00 per share. We will pay dividends on the Series A Preferred Stock only when, as and if declared by the board of directors. Dividends will accrue, on a non-cumulative basis, on the stated amount of $25.00 per share at a rate per annum equal to: (i) 6.150% during the first five years and payable quarterly in arrears beginning on June 15, 2019, and (ii) three-month LIBOR plus a spread of 3.650% per annum from March 15, 2024, reset quarterly and payable quarterly in arrears beginning on June 15, 2024.