This is a classic image that explains how the stock market works from a psychological point of view. The image is a very popular one and can be seen in magazines, newspapers, encyclopedias, and textbooks.
But who made it? The answer is Kevin Kallaugher. He has painted similar images since March 1978, when The Economist recruited him to become their first resident cartoonist in their 145 year history.
Here are a few other images related to the stock market: