Investment vs. Investments in Economics

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  • 0:04 Investment
  • 3:57 Ingredients of Investment
  • 5:52 Savings and Investment
  • 7:08 Lesson Summary
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Lesson Transcript
Instructor: Jon Nash

Jon has taught Economics and Finance and has an MBA in Finance

Discover the important difference between investment in economics and investments that individuals make by saving out of their income. This lesson defines and outlines the basic components of gross private domestic investment.


All right, we need to spend a little time talking about the word 'investment,' and we need to make a very important distinction. Just imagine this:

One of your neighbors (we'll call him Bob) owns a well-known lawn-cutting business. Bob cuts lawns all day long, especially during the summer months, of course. When he earns income from his business, he takes some of that income and decides to invest some of it into the stock market, buying 500 shares of Felix Homemade Ice Cream Stores. Let's say that this year was extremely profitable for Bob, and he notices that the demand for lawn-cutting services is increasing. Early in the year, he had 50 customers, but suddenly, 25 additional customers have just signed agreements for lawn-cutting services with Bob.

When Bob had 50 lawns, he was able to cut them all by himself using one mower throughout the week and just going from lawn to lawn. However, with 25 new customers and a full schedule of mowing already, that means that Bob's going to have to expand his lawn service in order to increase the supply of lawn cuts so he can meet rising demand. How does Bob expand? By investing into his business, which will end up flowing through the economy. For example, he invests by purchasing another lawn mower and also by hiring a worker.

Time-out. I want you to notice that I used the same word, 'invest,' to describe both of these two events. When Bob saved some of his income and purchased a stock, he called it investing. When he wanted to expand his business, though, he might describe it as 'buying more equipment' or 'expanding,' but economists call that investment. Understanding the difference between these two things is necessary to understand economics.

When we hear the word investment in economics, it refers to gross private domestic investment, and it's not referring to investments that most of us are familiar with, such as our 401-Ks or mutual funds. Investment is the value of all goods produced during a period for use in the production of other goods and services. So, all the things that go into the production process for consumer goods, such as the manufacturing equipment at a product factory, or buildings that house businesses along with the equipment that businesses use to supply goods and services to consumers. In the case of a service business, like Bob's lawn service, the purchase of additional mowers, as well as hiring a worker, were purchases that were made in order to provide the service of lawn mowing. These are considered investment.

We often hear and use the word investment in society, but most people are not referring to gross domestic private investment. When we say we purchased an investment in a large company stock, we're talking about a financial investment of money that either earns interest or has the potential to increase in value. Economists, on the other hand, use the term 'investment' to describe all the activities that lead to capital investments within an economy. They call the financial investments 'savings.'

Ingredients of Investment

Let's talk about the three main ingredients inside the investment component of our GDP:

  1. Business expenditures
  2. New residential homes constructed
  3. Changes in business inventories

The first category is business expenditures. When Bob's low-rider mowing service buys a new lawn mower today, this is considered an investment and is counted in our GDP for this year.

The second category is new residential housing. When Bob's business takes off, he decides to use some of his profit to build a new house. Once his house is constructed, this is now included in the investment component of our GDP.

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