Final answer:
Fixed-income investors use short-term actual GDP to gauge economy performance and potential GDP to assess the economy's capacity without inflation, which impacts interest rates and, subsequently, the Present Discounted Value of bonds. Inflation and government borrowing can affect these values, causing bond prices to fluctuate. The equilibrium in a Keynesian cross diagram may not align with potential GDP and is determined by spending levels in the economy.
Step-by-step explanation:
Fixed-income investors use actual GDP and potential GDP as indicators to assess the economic environment and prospects for their investments. Short-term actual GDP provides insights into the current performance of the economy, indicating whether the economy is expanding or contracting. Potential GDP, on the other hand, reflects the maximum possible level of output an economy can achieve without leading to increased inflation when all resources are fully employed.
Investors are interested in these metrics because they can affect inflation and interest rates, which have a direct impact on the present value of future cash flows from fixed-income securities like bonds. For instance, if the actual GDP is consistently above potential GDP, this might lead to inflation, which generally hurts bond prices as it can lead to higher interest rates. Conversely, if actual GDP is below potential GDP, there may be more room for economic growth without causing inflation, which could be beneficial for bondholders as it suggests a stable interest rate environment.
Additionally, in a situation where government borrowing increases, as shown in the shift from demand curve Do to D1 resulting in higher interest rates, this could affect the Present Discounted Value of a bond. If fixed income investors had locked in bonds at lower interest rates before the shift, the value of their bonds would decrease as newer issues offer higher rates. This is significant because fixed-income investments are sensitive to changes in interest rates - when rates go up, the present value of the future cash flows from the bond goes down, and the price of the bond decreases.
Lastly, with respect to a Keynesian cross diagram, the equilibrium is not always at or near potential GDP. The equilibrium represents the point where planned spending equals actual spending, which can be above, below, or at potential GDP, depending on various economic conditions and policy decisions.