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Interest Rates

Author: Sophia

what's covered
This lesson will cover the topic of interest rates, focusing on how the government finances expansionary fiscal policy and how the deficits incurred as a result can impact interest rates in an economy. Specifically, this lesson will cover the following:

Table of Contents

1. Fiscal Policy Goals: Short Term Versus Long Term

As a reminder, fiscal policy is typically the policy set by a central government authority whereby spending and/or taxation by the government are adjusted to stabilize economic activity.

We know that the government actually has two tools: spending and taxation. Fiscal policy, then, focuses on policies in these two areas. The goal is for the government to use these two tools to stabilize our economy’s movement through business cycles.

It is important to note, though, that there are short-term and long-term goals of fiscal policy.

In the short term, the goals of fiscal policy are full employment and price stability. The government will use taxation and spending to stabilize the economy when either unemployment or inflation rises.

In the long term, though, the goal of fiscal policy is to ensure economic growth, which is the measure of change in real GDP over periods of time. It is usually expressed as a percent change in the value of the sum of goods and services produced in a country’s natural borders over a specified time interval.

Now, let’s take a look at the difference between short-term and long-term fiscal policy:

Short-Term Fiscal Policy Long-Term Fiscal Policy
Focus Economic stabilization (getting back to equilibrium) Economic growth, development, and sustainability
Primary goal Reduce economic fluctuation and facilitate economic predictions Expand the production possibility frontier
Key goals Stabilizing aggregate demand and supply
Stimulating economic growth
Increasing employment
Reducing inflation
Promoting economic growth, development, and sustainability
Exploiting public debt
Exploiting income (re)distribution strategies
Addressing structural, foundational, and demographic challenges
Examples Adjusting businesses and individual taxes (cuts and rebates)
Adjusting transfer payments
Adjusting businesses and individual taxes (cuts and rebates)
Adjusting and exploiting public debts
Expanding accessibility to resources and public goods (education, security, and health care)
Economic scope Address cyclical economic fluctuation challenges Address structural and generational economic growth and development challenges
Time Few months to years Several years to decades

big idea
Our short-term fiscal policy decisions can impact our long-term ability to achieve economic growth because of the impact on our national debt.

terms to know
Fiscal Policy
Typically, policy set by a central government authority whereby spending and/or taxation by the government are adjusted to stabilize economic activity.
Economic Growth
Measure of the change in real GDP over periods of time; percent change in the value of the sum of goods and services produced in a country’s natural borders over a specified time interval.


2. Financing Expansionary Fiscal Policy: Debt

Without increasing taxes—because increasing taxes to finance expansionary fiscal policy takes money away from people and is thus counterproductive—the government must borrow money by selling Treasury securities to finance the increased government spending needed to stimulate the economy.

Therefore, the government takes on debt.

To increase demand and stimulate the economy in the short term, the government must spend more money than it collects in tax revenue. It must either increase its government spending or collect fewer taxes, or do both, to pump money into the economy and get people spending again.

When these government expenditures exceed tax revenue—which is expansionary fiscal policy—this is known as a deficit. Deficits are shortages that result from spending in excess of revenue. Deficits ultimately slow short- and long-term economic growth.

When the government borrows money to finance the expansionary policy needed, it has two options in the future for debt repayment:

  • Tax revenue
  • New debt
term to know
Deficits
Shortages that result from spending in excess of revenue.


3. Interest Rates

Let’s talk about the second option of debt repayment, which is when the government rolls over its debt and uses new debt to pay off previous debt.

At the very least, it has to pay interest to service the debt. Interest is defined as the cost of money. Nominal interest is the prevailing rate. Real interest rates reflect the prevailing rate adjusted for inflation, which means that the real interest rate is the nominal rate minus the inflation rate.

Interest is also a return on investment, where the return varies based on the risk profile of the investment, the time horizon, the opportunity cost of a comparable risk-free investment, and inflation expectations.

As you can see from the definition, there are many different ways in which we can look at interest. Today, we will focus on how interest is the price or cost of money.

think about it
If you choose to hold your money as cash or if you choose to go out and buy something with it, what is your opportunity cost for that decision? Well, you are sacrificing the ability to earn interest on that money. So, this is the first way in which we will approach the topic of interest rates.

term to know
Interest
The cost of money; a return on investment where the return varies based on the risk profile of the investment, the time horizon, the opportunity cost of a comparable risk-free investment, and inflation expectations. Nominal interest is the prevailing rate, whereas real interest reflects the prevailing rate adjusted for inflation.


4. The Money Market

Now, if we look at the money market and a graph of the supply and demand for money, we place the price of money, or the nominal interest rate, on the y-axis and the quantity of money on the x-axis.

We assume that the Fed controls the supply of money, so it is fixed and shown as a vertical line.

A graph illustrating the interplay of supply and demand in the money market. The vertical axis denotes the nominal interest rate, and the horizontal axis denotes the quantity of money. A downward-sloping line represents the demand for money, while a vertical line represents the money supply. A dashed horizontal line marks the equilibrium nominal interest rate, where the money supply and demand curves intersect.

The demand for money, though, does vary with interest rates. When interest rates are higher, you would likely prefer to keep your money in the bank instead of spending it, correct? This is because you are earning a higher interest rate on it. In addition, it is more expensive to take out loans.

As rates fall, it is not worth it to keep money in the bank. Now, it is more attractive to take out loans for a home, car, and so forth because the rates are lower.

4a. Fed’s Impact on Interest Rates

These are two graphs that show that the Federal Reserve can have a direct impact on interest rates by changing the money supply, which is what the Fed controls.

Notice that expansionary monetary policy reduces rates in the economy, whereas contractionary monetary policy raises rates in the economy.

Two graphs on the impact of increases and decreases in the supply of money on the nominal interest rate and quantity of money. The vertical axis denotes the nominal interest rate, and the horizontal axis denotes the quantity of money. A downward-sloping line represents the demand for money, while a vertical line represents the money supply. The graph on the left denotes expansionary monetary policy, where the money supply shifts to the right from MS1 to MS2, lowering the nominal interest rate from i r 1 to i r 2, indicated by a green arrow. The graph on the right denotes contractionary monetary policy, where the money supply shifts to the left from MS1 to MS2, raising the nominal interest rate from i r 1 to i r 2, indicated by a red arrow. Both graphs have the nominal interest rate on the vertical axis, the quantity of money on the horizontal axis, and a downward-sloping ‘Demand for Money’ curve.

The Fed can impact interest rates by changing the money supply through its tools: open market operations, the reserve requirement, and targeting rates.

4b. Government’s Impact on Interest Rates

Circling back to the government and fiscal policy, although the government cannot directly influence money supply, fiscal policy actions can indirectly impact the money market.

big idea
When the government needs to borrow money to finance expansionary policy, it enters the private market for loanable funds; it becomes someone else demanding a loan.

The government cannot shift the money supply the way the Fed can. With the government now borrowing money (selling government bonds), it becomes an additional demander for loans in an otherwise private market, and when the demand for loans increases, it drives up interest rates.


5. Expansionary Monetary Policy

It is important to keep in mind that when the government is enacting expansionary fiscal policy, the Fed will often do the same and use expansionary monetary policy by either buying Treasury securities or targeting lower rates.

You can see the impact of increasing the money supply in the graph below.

A graph on the impact of increasing the supply of money on the interest rate and quantity of money. The vertical axis denotes the nominal interest rate, and the horizontal axis denotes the quantity of money. Two vertical lines labeled MS1 and MS2 represent the money supply before and after the increase, with MS2 to the right. An arrow points from MS1 to MS2. The interest rate decreases from i r 1 to i r 2, denoted by two dashed horizontal lines from these points on the y-axis up to the downward-sloping line.

The effect is to drive rates down, which can offset the impact of the government demanding loans if it is also enacting expansionary monetary policy.

IN CONTEXT
In the recession that followed the housing crisis, it might have been expected that rates would skyrocket as the government borrowed huge sums of money to finance expansionary policies during that crisis.

The government wanted to ensure that our economy did not enter another Great Depression.

Even though it did borrow huge sums of money, rates actually fell for a couple of years. This was because the Fed also took action and enacted major expansionary monetary policies.

Had the Fed not done this, with the government entering the market for loanable funds, rates would have gone up, but because of the Fed’s actions, rates did not rise.

summary
We started today’s lessons with a review of fiscal policy goals, both short term and long term. We learned that the government has to finance expansionary fiscal policy by issuing debt. We also learned that the government pays interest rates to borrow money and either pays the interest with tax revenue or by rolling it over.

Note that both the Federal Reserve and the government can impact the money market and interest rates. We learned that the Fed can have a direct impact on interest rates by changing the money supply, which is what the Fed controls. In addition, if the government rolls over the debt taken on to enact expansionary fiscal policy, these deficits can raise interest rates as the government enters the market for loans.

Source: THIS TUTORIAL WAS AUTHORED BY KATE ESKRA FOR SOPHIA LEARNING. PLEASE SEE OUR TERMS OF USE.

Terms to Know
Deficits

Shortages that result from spending in excess of revenue.

Economic Growth

Measure of the change in real GDP over periods of time; percent change in the value of the sum of goods and services produced in a country’s natural borders over a specified time interval.

Fiscal Policy

Typically, policy set by a central government authority whereby spending and/or taxation by the government are adjusted to stabilize economic activity.

Interest

The cost of money; a return on investment where the return varies based on the risk profile of the investment, the time horizon, the opportunity cost of a comparable risk-free investment, and inflation expectations. Nominal interest is the prevailing rate, whereas real interest reflects the prevailing rate adjusted for inflation.