Every dollar spent on a single item is a dollar unavailable for other items. That dollar must provide a suitable return - measured against what you could have earned on tha dollar somewhere else.
Investors should look at their investments similarly.
Because the market tempts us with thousands of potential investments each day, we tend to screen our stock choices until we find those that meet our risk and return characteristics. Likewise, we've learned to benchmark our investments by comparing their performance against the S&P 500 index or some other proxy.
If your portfolio rose just 8% in a year in which the S&P 500 index rose 20%, the opportunity cost on your money was great - you lost the chance at an extra 12 percent a year because the investments you chose did poorly.
Investors should look at their investments similarly.
Because the market tempts us with thousands of potential investments each day, we tend to screen our stock choices until we find those that meet our risk and return characteristics. Likewise, we've learned to benchmark our investments by comparing their performance against the S&P 500 index or some other proxy.
If your portfolio rose just 8% in a year in which the S&P 500 index rose 20%, the opportunity cost on your money was great - you lost the chance at an extra 12 percent a year because the investments you chose did poorly.
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