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Hypothecation is the posting of collateral
to secure an obligation. Rehypothecation is the
reuse of posted collateral.
For example, if an institution receives collateral from a counterparty
to secure an obligation, that institution may rehypothecate the
collateral by lending
it, repoing it, or posting it as collateral for one of its own obligations to
a third party.
Rehypothecation is not permitted in some
jurisdictions. It is common practice in the United States. Any collateral
agreement should
explicitly permit or not permit rehypothecation.
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