Our total liabilities increased 3.3% fromW295,730 billion as of December 31, 2017 toW305,565 billion as of June 30, 2018, principally as a result of a 54.1% increase in other financial liabilities fromW13,892 billion as of December 31, 2017 toW21,408 billion as of June 30, 2018, which was enhanced by a 1.4% increase in deposits due to customers fromW234,695 billion as of December 31, 2017 toW237,900 billion as of June 30, 2018. The increase in other financial liabilities mainly reflected a 92.3% increase in accounts payable fromW4,692 billion as of December 31, 2017 toW9,022 billion as of June 30, 2018, which was enhanced by a 222.8% increase in domestic exchange payables fromW1,310 billion as of December 31, 2017 toW4,229 billion as of June 30, 2018. The increase in deposits due to customers was primarily due to a 2.3% increase in deposits in local currency fromW211,052 billion as of December 31, 2017 toW215,993 billion as of June 30, 2018.
Our total equity increased 2.1% fromW20,565 billion as of December 31, 2017 toW20,996 billion as of June 30, 2018. Such increase mainly reflected a 5.5% increase in retained earnings fromW15,620 billion as of December 31, 2017 toW16,473 billion as of June 30, 2018, which was partially offset by an 8.4% decrease in hybrid securities fromW3,018 billion as of December 31, 2017 toW2,763 billion as of June 30, 2018 and a 9.0% increase in negative other equity fromW1,939 billion as of December 31, 2017 toW2,113 billion as of June 30, 2018. For information regarding the impact of the adoption of IFRS 9 on our equity, see Note2-(1)-e) of the notes to our unaudited consolidated interim financial statements included elsewhere in this prospectus.
Liquidity
Our primary source of funding has historically been and continues to be customer deposits, particularly lower-cost retail deposits. Deposits amounted toW234,695 billion as of December 31, 2017 andW237,900 billion as of June 30, 2018, which represented approximately 82.7% and 82.8% of our total funding, respectively. We have historically been able to use customer deposits to finance our operations generally, including meeting a portion of our liquidity requirements. Although the majority of deposits are short term, it has been our experience that the majority of our depositors generally roll over their deposits at maturity, thus providing us with a stable source of funding. However, in the event that a substantial number of our depositors do not roll over their deposits or otherwise decide to withdraw their deposited funds, we would need to place increased reliance on alternative sources of funding, some of which may be more expensive than customer deposits, in order to finance our operations. See “Item 3.D. Risk Factors—Other risks relating to our business—Our funding is highly dependent onshort-term deposits, which dependence may adversely affect our operations” in our Annual Report on Form20-F for the year ended December 31, 2017 incorporated by reference in this prospectus. In particular, we may increase our utilization of alternative funding sources such asshort-term borrowings and cash and cash equivalents (including funds from maturing loans), as well as liquidating our positions in trading and investment securities and using the proceeds to fund parts of our operations, as necessary.
We also obtain funding through borrowings and issuances of debentures to meet our liquidity needs. Borrowings represented 6.4% and 6.9% of our total funding as of December 31, 2017 and June 30, 2018, respectively. Debentures represented 9.8% and 9.3% of our total funding as of December 31, 2017 and June 30, 2018, respectively.
Our liquidity risks arise from withdrawals of deposits and maturities of our borrowings and debentures, as well as our need to fund our lending, trading and investment activities and to manage our trading positions. Our goal in managing our liquidity is to be able, even under adverse conditions, to meet all of our liability repayments on time and to fund all investment opportunities. For a discussion of how we manage our liquidity risk, see “Item 11. Quantitative and Qualitative Disclosures about Market Risk—Liquidity Risk Management” in our Annual Report on Form20-F for the year ended December 31, 2017 incorporated by reference in this prospectus.
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