Behind every stock is a company. Find out what it's doing.

You just don't know when you can find the bottom.

When you start to confuse Freddie Mac, Sallie Mae and Fannie Mae with members of your family, and you remember 2,000 stock symbols but forget the children's birthdays, there's a good chance you've become too wrapped up in your work.

The Rule of 72 is useful in determining how fast money will grow. Take the annual return from any investment, expressed as a percentage, and divide it into 72. The result is the number of years it will take to double your money.

I can't recall ever once having seen the name of a market timer on Forbes' annual list of the richest people in the world. If it were truly possible to predict corrections, you'd think somebody would have made billions by doing it.

When stocks are attractive, you buy them. Sure, they can go lower. I've bought stocks at $12 that went to $2, but then they later went to $30. You just don't know when you can find the bottom.

Hold no more stocks than you can remain informed on.