I think it would be difficult for your friend to argue mis-selling. He left the proceeds of a house sale (600k) in the bank, as you say, ‘for a number of years’ where its value was being eaten away by inflation. This does not seem to indicate that he was in any hurry to purchase a new property. If the bank sold him a capital guaranteed bond it would appear to be looking after his interests in that the capital is guaranteed and he stands to gain an increase based on the value of equities, thus receiving some protecting against inflation. I doubt that the bank deceived your friend over the duration of the bond. That its capital is guaranteed only by holding the bond for 5 years is almost certainly stated in its publicity. Your friend may have had an ‘intention’ to buy a house, the way I have an intention to date Paris Hilton, but his behaviour, by letting money waste away by inflation while property prices increase daily does not indicate any serious intent. So he bought a financial product that met his needs (capital guarantee and possible protection against inflation). His needs have now changed but that does not mean he was mis-sold the product.