Last month, I lost about 30 million won while averaging down. I started off small, but then I got greedy trying to recover my losses, and that was the end of it.
Still, I'm glad I have a home I actually live in; if I didn't, it could have been a real disaster. From now on, I'm just going to stick with index funds. I guess personal finance is something you learn by getting burned.
If anyone has had a similar experience, please leave a comment... I just want some reassurance that I'm not crazy.