[alexhawket]

The interest rate is a measure of the leverage you can apply when buying that mortgage.

Lower interest rates mean more leverage. Increased leverage increases risk.

If they lower the interest rate, you can buy a more expensive home.. but you increase the risk you'll lose all your equity from a small change in house prices.

Right now in the US, more than 30 percent of homeowners are underwater on their mortgage.

If they decide to raise interest rates and you have a variable rate mortgage or have to renew it, your mortgage payments can shoot skyhigh.

Either way, record low rates make the system susceptible to systemic shocks and cascade failures.

Free trade and de-regulation means capital is free to flow quickly around the world. Investors can lose faith and a country can go from solvent to bankrupt in a matter of months. Interest rates shoot up and anyone caught with debt races to pay it off with dwindling incomes while the payments get bigger every day.