The stock market's last line of defense is giving way

"Braveheart"/Paramount Pictures Two things about human nature are pretty predictable. The first is that humans have short memories. Second, they never learn from their mistakes. The same goes for investors. Markets change, the companies that dominate the markets change, technology changes, but human nature never changes. Not that long ago we experienced a huge financial crisis where many people watched their 401(k) turn into a 201(k). While the markets rebounded to new highs in recent years, a l...