So, interest rates may soon drop to 0%.
This creates an interesting opportunity.
Let's imagine two people:
Person A: Has a mortgage at a fixed rate of interest (say 6%)
Person B: Has some money to save.
If the savings rates on offer are low - say 2% - it would benefit person B to lend the money to person A instead.
Person A could offset this money against their mortgage and avoid paying the 6% interest charge on that money. They could, therefore, afford to pay person B a competitive rate of interest - perhaps 4% - and still come out ahead. One might imagine that there could be lots of people like Person "A" out there (mentioning no names...). I'm sure they'd be interested in such a scheme.
There are three problems, all of them solvable:
1) Person B is likely to be liable for tax on this income so interest rates may have to fall quite far for it to be an attractive deal
2) Person B will worry about the possibility of default by Person A
3) Persons A and B have to find each other.
Problems 2) and 3) could be solved by the introduction of some sort of intermediary. Let's call it a bank.
The bank will wrap up the default risk with their fee for providing the matching service and other administration and capture it as a spread between the rate they'd pay to person B and the rate they'd expect from person A.
So this idea would actually only work if rates fell so far that unsecured bank *lending* rates fell below 6%.
Does anybody see that happening any time soon?