How does under investment affect the market​

Since the stock market is a vote of confidence, a crash can devastate economic growth. Lower stock prices mean less wealth for businesses, pension funds, and individual investors. Companies can't get as much funding for operations and expansion. When retirement fund values fall, it reduces consumer spending.

Explanation:

Economic Considerations

Business investment can affect the economy's short-term and long-term growth. In the short term, an increase in business investment directly increases the current level of gross domestic product (GDP), because physical capital is itself produced and sold.