[chii]

> if you keep making your payments, there is no way for a bank to force you out of your mortgage or call for additional capital due to a decline in value.

it's the same coin, you're just looking at it from a different angle. The timeframes are certainly different between foreclosure and margin calls, but the concept is the same - the lender sees you as more risky than they originally intended, and chooses to liquidate you. In a foreclosure, you "prevent it" by constantly paying the interest. In a margin call, you are not paying until you hit the drop in valuation, and you have to pay to top it back up.