Securities evaluations are not simple. And the media usually getexplanations wrong.
I repeat: The strategy an investor should use will depend on the original investment intent when the securities are purchased. What is the purpose of the purchase? What is the reasoning in terms of investor age, goals, risk accommodation, and psychology?
And, importantly, the extent of discipline the investor has decided to employ to keep to that strategy until it's time to sell.
Provided, the investor is really disciplined. (See the Earl J. Weinreb NewsHole® comments and @BusinessNewHole tweets.)
