Answer:
a rational investor will only take on higher risk if he expects a higher return.
Step-by-step explanation:
Rate of return can be defined as the percentage of interest or dividends earned on money that is invested.
In Financial accounting, a return refers to the amount of profit generated by an investor on an investment over a specific period of time.
Basically, the rate of return which is typically expressed as a percentage of the initial costs of an investment can either be a gain or a loss on an investment. Therefore, a positive rate of return on an investment over a specific period of time, simply means that an investor is making a profit (gains) while a negative rate of return on an investment over a specific period of time, indicates that the investor is running at a loss.
Hence, the rate of return is used as a long-term decision-making tool to determine whether or not an investment is worth it.
Thus, the principle of risk-return trade-off means that a rational investor will only take on higher risk if he expects a higher return.