Explain how the concept of a positive risk-return relationship breaks down if you can systematically find stocks

Question:

Explain how the concept of a positive risk-return relationship breaks down if you can systematically find that are overvalued and undervalued.

Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing...