What Can We Learn From Past Market Downturns?

I'm sure you don't need me to tell you that investment markets around the world have been experiencing challenging times over the past year. Shares, bonds, and property, everything is down and there have been few places to hide. So this week I wanted to consider what we could learn from past market declines. What can we take away to help us not only get through this current period, but perhaps even take advantage of the opportunities that might present. [Disclaimer]