collateral from unencumbered FFELP Loans. As of June 30, 2019, March 31, 2019, and June 30, 2018, the maximum additional capacity under these facilities was $1.1 billion, $1.3 billion and $1.8 billion, respectively. For the three months ended June 30, 2019, March 31, 2019 and June 30, 2018, the average maximum additional capacity under these facilities was $1.3 billion, $1.1 billion and $1.6 billion, respectively. For the six months ended June 30, 2019 and 2018, the average maximum additional capacity under these facilities was $1.2 billion and $1.9 billion, respectively. As of June 30, 2019, the maturity dates of the FFELP Loan-other facilities ranged from November 2019 to April 2021.
Liquidity may also be available from our Private Education Loan asset-backed commercial paper (“ABCP”) facilities. Maximum borrowing capacity under the Private Education Loan-other facilities will vary and be subject to each agreement’s borrowing conditions, including, among others, facility size, current usage and availability of qualifying collateral from unencumbered Private Education Loans. As of June 30, 2019, March 31, 2019 and June 30, 2018, the maximum additional capacity under these facilities was $1.3 billion, $1.3 billion and $830 million, respectively. For the three months ended June 30, 2019, March 31, 2019 and June 30, 2018, the average maximum additional capacity under these facilities was $1.4 billion, $956 million and $719 million, respectively. For the six months ended June 30, 2019 and 2018, the average maximum additional capacity under these facilities was $1.2 billion and $804 million, respectively. As of June 30, 2019, the maturity dates of the Private Education Loan facilities ranged from October 2019 to December 2021.
At June 30, 2019, we had a total of $5.9 billion of unencumbered tangible assets inclusive of those listed in the table above as sources of primary liquidity. Total unencumbered education loans comprised $2.8 billion of our unencumbered tangible assets of which $2.5 billion and $256 million related to Private Education Loans and FFELP Loans, respectively. In addition, as of June 30, 2019, we had $8.1 billion of encumbered net assets (i.e., overcollateralization) in our various financing facilities (consolidated variable interest entities). Since the fourth quarter of 2015, we have closed on $4.1 billion of Private Education Loan ABS Repurchase Facilities. These repurchase facilities are collateralized by Residual Interests in previously issued Private Education Loan ABS trusts. These are examples of how we can effectively finance previously encumbered assets to generate additional liquidity in addition to the unencumbered assets we traditionally have encumbered in the past. Additionally, these repurchase facilities had a cost of funds lower than that of a new unsecured debt issuance.
For further discussion of our various sources of liquidity, our access to the ABS market, our asset-backed financing facilities, and our issuance of unsecured debt, see “Note 6 — Borrowings” in our Annual Report on Form10-K for the year ended December 31, 2018.
The following table reconciles encumbered and unencumbered assets and their net impact on GAAP total tangible equity.
| | | | | | | | | | | | |
(Dollars in billions) | | June 30, 2019 | | | March 31, 2019 | | | June 30, 2018 | |
Net assets of consolidated variable interest entities (encumbered assets) — FFELP Loans | | $ | 4.4 | | | $ | 4.5 | | | $ | 4.8 | |
Net assets of consolidated variable interest entities (encumbered assets) — Private Education Loans | | | 3.7 | | | | 4.1 | | | | 5.2 | |
Tangible unencumbered assets(1) | | | 5.9 | | | | 6.2 | | | | 6.4 | |
Senior unsecured debt | | | (10.5) | | | | (11.5) | | | | (13.0) | |
Mark-to-market on unsecured hedged debt(2) | | | (.4) | | | | (.2) | | | | — | |
Other liabilities, net | | | (.6) | | | | (.4) | | | | (.5) | |
| | | | | | | | | | | | |
Total tangible equity — GAAP Basis | | $ | 2.5 | | | $ | 2.7 | | | $ | 2.9 | |
| | | | | | | | | | | | |
(1) | At June 30, 2019, March 31, 2019 and June 30, 2018, excludes goodwill and acquired intangible assets, net, of $769 million, $780 million and $798 million, respectively. |
(2) | At June 30, 2019, March 31, 2019 and June 30, 2018, there were $341 million, $155 million and $(70) million, respectively, of net gains (losses) on derivatives hedging this debt in unencumbered assets, which partially offset these gains (losses). |
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