Opportunity Cost

The potential benefit an investor gives up when choosing one investment over another.

• Definition: The return that could have been earned on the next-best alternative investment
• Applies to every investment decision; choosing bonds over stocks means forgoing the potentially higher equity returns (and vice versa)
• Also applies to holding cash: the opportunity cost of keeping money in a savings account is the higher return that could have been earned in the market
• Not a direct financial loss; it is a foregone gain, making it an implicit cost rather than an explicit one
• Opportunity cost is a factor in risk tolerance discussions: conservative investors accept lower returns (and higher opportunity cost) in exchange for lower risk

Key exam applications:

• An investor who holds cash during a bull market incurs an opportunity cost equal to the market gains they missed
• An investor who locks into a long-term bond at 4% has an opportunity cost if rates rise to 6% (they are stuck at the lower rate)

Exam Tip: Gotchas

• Opportunity cost is NOT the same as an actual loss. It is the foregone return from the next-best alternative. The exam may present scenarios where an investor "lost" nothing in absolute terms but still incurred an opportunity cost by choosing a lower-returning investment.