Question

the graph below shows the dow jones industrial average for the 1920s: public domain which business practice contributed to the trend shown on this graph? outsourcing labor buying on margin derivatives trading vertical integration

Explanation:

In the 1920s, buying on margin was a popular practice where investors paid a small percentage of a stock's price as a down - payment and borrowed the rest. This increased the demand for stocks and contributed to the upward trend of the Dow Jones Industrial Average shown in the graph. Outsourcing labor was not a major factor in this stock - market boom. Derivatives trading was not as prominent as buying on margin during this period. Vertical integration is related to business structure rather than directly to stock - market speculation that drove this trend.

Answer:

B. buying on margin