That’s true, except that you can only get a loan in Denmark if you have 20% of the purchase price to put down as collateral. That means sub prime mortgage lending doesn’t exist in Denmark and that combined with liar/NINJA loans was a substantial contribution to the US housing crash, together with securitisation. If it had been impossible to securitise mortgages with less than 20% down in collateral the housing crash would have been a non event in the financial markets.