Here is a question from a reader:
Why is the RBA rate is "so important when the banks keep claiming that the majority of their funding is from overseas? This is the main excuse for the differences between the RBA changes and the bank's changes.
- Why don't the banks rely on the RBA as their principal funding source?
- The RBA can't actually run out of money, so why the need to get funding from overseas, which presumably is subject to currency fluctuations?
The job of the banks is one of transformation: transform maturity of debt, provide liquidity and transform counter party risk.
Banks commit to lending to clients over a 30 year period. This is obviously a long term maturity. The Reserve Bank generally will only lend over very short periods of time - 1 day to a few months. Similarly, a bank could borrow from a large superannuation fund for a month or a fixed term deposit, but it certainly could not match the term of maturity they lend to borrowers. There is obviously a maturity risk here. For example, the bank's average lending maturity may be 20 years, but their deposits may only have an average maturity of 3 years. Banks must manage the maturity risk between a Superfund depositor and a home borrower. When they got into trouble in the GFC, and less so now, banks found it hard to rollover their funding and had to go to the Reserve Bank. By borrowing short term from the Reserve bank, the banks shortened their average debt maturity, which is seen as risky.
A home borrower would find it impractical to borrow from a retired investor for a shorter term for obvious reasons of counterparty risk, the borrower may not be able to repay on maturity or if the investor changed their mind.
So the banks' main job is to find investors who want to lend for longer periods of time compared to only the ultra-short time periods the RBA is prepared to lend.
Borrowing Overseas - The RBA reports on figures of how much Australian banks borrow from overseas. That figure is split between funds that are borrowed in Australian dollars and funds that are borrowed in a foreign currency. Borrowing from an overseas company based in Australian dollars is exactly the same as borrowing from a domestic entity. Overseas companies that lend in Australian dollars may be less prepared to lend for longer maturities when their view on Australia becomes less optimistic, so by its nature is "hotter" money.
An Australian bank may be able to find it a lot easier to find "maturity liquidity" by borrowing in a foreign currency. So for example, ANZ could borrow 5 year US dollars. But they do not want the currency exposure. So as a separate transaction the bank does a currency swap. A currency swap, in this case, is selling the US dollars you borrowed today in exchange for Australian dollars
and in the future buying the US dollars back and selling A$.
So now the bank has 3 very different risks. Lend to a home borrower for 30 years (interest monthly), borrow US dollars for 5 years (interest 6 monthly), and a currency swap. The currency swap liquidity may only come from speculators, so when the GFC hit and more recently, the currency swap lines dried up. This is why the US Federal Reserve offered unlimited liquidity swap lines, see
here,
here and
here. When this 3rd leg of liquidity dries up everybody must term to Uncle Sam. When the GFC hit everybody thought the US currency would tank, but it did the opposite. Thats because European/Offshore investors had to rollover their currency swap lines because they already had the crappy assets (Mortgages) they couldn't sell, creating massive demand for US dollars.
So back to the 3 very different risks - the asset failed (mortgages), the currency swap lines dried up, and the banks still had their borrowings (hello short term lender of only resort Reserve bank borrowings).
So everything funnels through the short term RBA window to investors seeking longer tern investment preferences. Banks need to entice investors to longer maturities based on price and demand. Given that bank deposits are Government Guaranteed (up to $250k) there should be no counterparty risks.
Michael Cornips