Originally Posted by pp215
Figure 26 illustrates a typical swap line transaction, in which FRBNY
exchanged dollars for the foreign central bank’s currency at the prevailing
exchange rate and the foreign central bank agreed to buy back its
currency (to “unwind” the exchange) at this same exchange rate at an
agreed upon future date. The foreign central bank would then lend the
dollars to banks in its jurisdiction. Foreign central banks assumed the risk
of losses on these dollar loans and paid FRBNY the interest collected on
these loans. FRBNY did not pay interest on the foreign currency it
received under the swap lines. To avoid difficulties that could arise for
foreign central banks in managing the level of their currency reserves,
FRBNY agreed not to lend or invest the foreign currency.