Rule No. 19: When the Chiefs Retreat, So Should You

Editor's note: Jim Cramer's new book, Real Money: Sane Investing in an Insane World, is available in selected bookstores now. As a special bonus to RealMoney readers, we will be running Cramer's "Twenty-Five Rules of Investing." For more about the new book and to order it, click here. Today, we present Cramer's nineteenth rule of investing. Read more about his rules:

1. Pigs Get Slaughtered
2. It's OK to Pay the Taxes
3. Don't Buy All at Once
4. Buy Damaged Stocks
5. Diversify to Control Risk
6. Do Your Homework
7. Don't Panic
8. Buy Best-of-Breed
9. Defend Some Stocks
10. Don't Bet on Bad Stocks
11. Don't Own Too Many Names
12. Cash Is for Winners
13. No Woulda, Shoulda, Couldas
14. Expect Corrections
15. Watch Bonds
16. Don't Subsidize Losers
17. Check Hope at the Door
18. Be Flexible

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Lots of guys had lots of reasons to sell Enron. I only needed one of them: The CEO quit for personal reasons. ...