Remember to factor in opportunity cost and the cost of inflation. Particularly with rates as low as they are now, debt makes plenty of sense. I refinanced my mo

Remember to factor in opportunity cost and the cost of inflation. Particularly with rates as low as they are now, debt makes plenty of sense. I refinanced my mortgage for another 30 years at 3.1%. Not only can the market beat that on average, the real purchasing power of the "extra" money in a few decades may be less than those dollars now. To be honest, at those rates I'm almost kicking myself for not pulling more equity out. As a real example, what will increase in value more in those 30 years: the principal on your loans (which in effect costs you double), an Index fund tied to the S&P 500, or a down payment on a house?