Investment Shock Absorbers
The following article is provided by Jim Parker, Vice President of Dimensional Fund Advisors, on the reasons to diversify beyond just large company US stocks and bonds (click to download a PDF).
"Ever ridden in a car with worn-out shock absorbers? Every bump is jarring, every corner stomach-churning, and every red light an excuse to assume the brace position. Owning an undiversified portfolio can trigger similar reactions."