Final answer:
Due to the recent reduction in corporate income tax rates, we can expect investment spending to increase and the equilibrium interest rate to decrease, all else being the same.
Step-by-step explanation:
The recent reduction in corporate income tax rates will lead to an increase in investment spending and a decrease in the equilibrium interest rate, all else being the same.
When corporate income tax rates are lowered, businesses have more after-tax profits available to invest. This increase in investment spending will lead to an increase in aggregate demand and economic growth. As a result, the equilibrium interest rate in financial markets will decrease.