[hiq]

> But the same people can't explain why it's a bad idea to take out a 2nd mortgage to invest in the market, or even secure a low-interest loan with your home as collateral. But isn't it exactly the same thing?

So what was their reasoning?

In the end it's all math, where some numbers are random variables with the corresponding variance. So this all depends on what rate you get, what returns you expect from the market, what's your risk tolerance, etc.