If one borrows the equivalent of three years' income to buy a house, a mortgage rate of 6% means that 18% of one's income goes to interest payments, which may be tolerable. But if the rate rises to 8%, mortgage interest payments rise to 24%, which, together with amortization, taxes, other debts, and necessary expenditures, may claim too much of the family budget.
如果某人以6%的按揭利率贷了相当于其三年总收入的购房款，这就意味着其收入的18%将会用于偿还利息，这样的负担也许还能承受。但如果利率上升至8%，按揭还款利息的比例就会上升到24%，再加上分期付款、杂税、其它债务和必要支出，这样的负担可能就会超出一个家庭的还款能力。在此情况下，有些人可能就会出售其标价过高的住房，由此带来的市场不平衡就会导致房价下跌。