A costly investment mistake: confusing volatility with risk

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Apr 24, 2008
Confusing volatility and risk could cost you a bundle. Let’s take a look at returns on an investment of $1000 over 50 years from 1958-2007 in five asset classes.


Small cap value: $3,750,000


Small cap growth: $1,380,000


Large cap value: $854,000


Large cap growth: $130,000


CD: $13,800





Isn’t it obvious which is the best long-term investment?


Why small cap value is the best long-term investment


So you don’t have a 50-year investment horizon? Few of us do. How about a ten-year horizon? In any ten-year period from 1958 to 2007, small cap value had much better investment results than a “safe” CD. (See Table below. Green = best result in the given ten years; red = worst.)


Table: How would $1 investment become?


10 year periods


Small Cap Growth


Small Cap Value


Large Cap Growth


Large Cap Value


CD


1958-1967


$5.64


$8.02


$3.22


$5.39


$1.36


1968-1977


$0.97


$2.66


$1.2


$2.64


$1.75


1978-1987


$3.38


$7.84


$3.52


$4.96


$2.41


1988-1997


$2.87


$6.47


$5.38


$5.13


$1.7


1998-2007


$1.53


$3.47


$1.77


$2.36


$1.42


Annual volatility


28.23%


24.05%


17.67%


18.54%


1.7%







Safety paradox


Even though a FDIC guaranteed CD is perceived to be safe, over time, inflation eats away at returns. For the long-term investor - and by that we mean you - small cap value is less risky.


Why do few investors put their long-term money in small cap value? And, when the going gets rough, why do many small-cap-value investors switch their money to CDs?


Here’s why, small cap value is highly volatile (See last row of Table) and volatility makes us anxious and jumbles our judgments.


“Volatility does not measure risk.” -Warren Buffet


Volatility becomes risk only when the investor can’t stand it anymore, and abandons an otherwise safe long-term investment. Typically, volatility is highest and its impact most painful when the market reaches bottom. Not surprisingly, many investors bail out at the worst possible time.