Buy and Sell Combinations

A buy and sell combination occurs when an investment is purchased on a given date and time and then sold on another date and time. The interval between the purchase and sale can be any unit of time.

A buy and sell combination results in a percent return that is a profit, loss or break-even.

Return = ((Sell price - buy price) / buy price) * 100.

The formula used to compute the number of buy and sell combinations (returns) for a series of N prices is:

N*(N-1)/2

Example

Below is an example of 45 buy and sell combinations resulting from 10 prices.


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