Stop Watching Stock Indices or You Could Destroy Your Portfolio
NEW YORK (TheStreet) -- As investment advisers, one of our biggest challenges is getting clients to focus on the big picture. In particular, many investors find it hard to break the habit of comparing the performance of various well-known stock indices to that of their own portfolios.
My message to many clients is this: Take your focus off indices and put it on your goals. Why? Because obsessing about index returns (and perceived discrepancies compared to your own investments) can cause you to abandon rationally made asset allocation choices, increasing risk and leading to costly panic buying and selling that can decimate the value of a portfolio.
Consider this: An investor who panicked in March 2009, sold $100 worth of stock and placed that $100 in a money market fund would have earned $1 more by the summer of 2013. Investors who stayed in the market over the same period saw their investments climb by approximately $44. [Source: Michael Finke, professor and coordinator, doctoral program in personal financial planning, Texas Tech University, in his 2013 article "Why Stock Investors Freak Out" in Research Magazine.]
- The Dow Jones Industrial Average
includes only 30 large company stocks and represents about one-quarter of the value of the entire U.S. stock market. Furthermore, the DJIA is price-weighted. This means a $1 change in the price of a $188 stock in the index will have the same effect as a $1 change in a $20 stock, even though one may have actually changed 0.2% and the other by 5%.
- The S&P 500
, of course, tracks 500 major U.S. companies. These have been chosen to include a range of industry sectors and represents about 70% of the total value of the U.S. stock market. Yet its focus on large companies means it's not representative of the entire market, smaller stocks in particular. Furthermore, the S&P is market-weighted. If the total market value of all 500 companies falls 10%, the value of the index falls 10%. A 10% movement in all 30 stocks of the DJIA would not cause a 10% change in that index.
- The Russell 2000
(IWM) tracks smaller U.S. companies. Note that it's market value-weighted (on market cap) of 2,000 of the smallest stocks. In other words, it tracks the largest of the small.
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