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A currency swap is a
form of swap. It is most easily understood by
comparison with an interest rate swap.
An interest rate swap is a contract to exchange cash flow streams that
might be associated with some fixed income obligations—say swapping the
cash flows of a fixed rate loan for those of a
floating rate loan. A currency swap
is exactly the same thing except, with an interest rate swap, the cash
flow streams are in the same currency. With a currency swap, they are in
different currencies.
That difference has a practical consequence. With an
interest rate swap, cash flows occurring on concurrent dates are
netted. With a currency swap, the
cash flows are in different currencies, so they can't net. Full
principal
and interest payments are exchanged without any form of netting.
Suppose the spot
JPY/USD
exchange rate is 109 JPY per USD. Two firms might enter into a currency
swap to exchange the cash flows associated with
a five-year
USD 100MM loan at 6-month USD Libor, and
a five year
JPY 10,900MM loan at a fixed 3.15% semiannual rate.
All cash flows associated with those loans are paid:
initial
receipt/payment of loaned principal,
payment/receipt
of interest (in the same currency) on that loan,
ultimate
return/recovery of the principal at the end of the loan.
Vanilla currency swaps
are quoted both for fixed-floating and floating-floating (basis
swap) structures.
Fixed-floating swaps are quoted with the interest rate payable on the
fixed side—just like a vanilla interest rate swap. The rate can either be
expressed as an absolute rate or a
spread over some government bond rate. The floating rate is always
"flat"—no spread is applied. Floating-floating structures are quoted with a spread applied to one of the floating indexes.
Currency swaps can be used to exploit inefficiencies in
international debt markets. Suppose a
corporation needs an
AUD 100MM loan, but US-based
lenders are willing to offer more favorable terms on a USD loan. The
corporation could take the USD loan and then find a third party willing to
swap it into an equivalent AUD loan. In this manner, the firm would obtain
its AUD loan but at more favorable terms than it would have obtained with
a direct AUD loan. That advantage must, of course, be balanced against the
transaction costs,
pre-settlement risk and
settlement risk associated
with the swap. This is illustrated in Exhibit 1.
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By entering into a swap with a third
party, a corporation can convert an USD loan into an AUD loan. |
Just as a vanilla
interest rate swap is equivalent to a strip of
FRA's, a vanilla
fixed-floating currency swap is equivalent to a strip of currency
forwards.
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