What does not take into account the holding period which may then miss opportunity cost?

The question seems to be referring to a concept in finance or economics. However, without a specific context or subject, it's a bit difficult to provide an accurate answer. Generally speaking, any financial or economic analysis or model that does not consider the "holding period" of an investment could potentially miss the opportunity cost.

Opportunity cost refers to the potential benefits an individual, investor, or business misses out on when choosing one alternative over another. The holding period of an investment is the total amount of time the investment is held by an investor, or the period between the purchase and sale of a security.

For example, in the context of investment analysis, if an analyst does not take into account the holding period of a stock or bond, they may miss the opportunity cost of holding that investment. This could be the potential returns from other investments that could have been made during that same period.

In the context of economic or business decision-making, if a business does not consider the holding period (or time value) of money or resources, they may miss the opportunity cost associated with alternative uses of those resources.

So, to answer your question, any financial, economic, or business model or analysis that does not consider the holding period could potentially miss the opportunity cost.