Two rules: 1. Preserve the principal 2. When in doubt, see Rule #1.
A stock doesn't know that you own it.
Do not put all your eggs in one basket.
I've argued with the senators and congressmen I've talked to. You don't want to be too little too late. If you buy them at the right price, you may be buying two trillion of face value.
Mr. Market is your servant, not your guide.
Larger sums may be an advantage at some cases and a disadvantage at others.