Answer:
This INCREASES the potential return to the investor and INCREASES the risk.
Step-by-step explanation:
Whenever a company or an investor operates with a high level of leverage, the potential returns increase, but the potential risks also increase since the possibility of not being able to pay back the borrowed money always exists.
Buying stock on the margin was the main cause of the stock market collapse prior to the Great Depression in 1929. Since the price of stocks had constantly increase during a relatively long period of time, speculative investors thought they could increase their earnings by borrowing money and investing in the stock market. It all worked perfectly, many made millions, until something failed and like a sand castle, the stock market collapsed immediately.
Nowadays borrowing on the margin still exists and broker firms exercise a larger control on the stock prices. If they fall below a maintenance margin, the broker requests that the investor deposit more funds into their account or they gain control over the stocks.