The Post Office Guaranteed Capital Bond is a fixed term deposit account that pays a return linked to the stock market.
Two readings of the FTSE 100 index are taken on two specific dates, and if the second FTSE 100 index reading is equal to or higher than the first, you receive a competitive interest payment.
However, if the second reading is lower than the first, the capital guarantee element of the Post Office Guaranteed Capital Bond means that you will still get your initial investment back.