Overnight Index Swap (OIS) - Financial definition
Concise definition of the term Overnight Index Swap
An Overnight Index Swap is an interest rate swap where a fixed rate is exchanged against a floating rate which is an overnight reference rate like the [ACR0010599S]EONIA[ACR0010599E] for the euro or the [ACR0013904S]SONIA[ACR0013904E] for the British pound.