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Why Rates Matter

Adam M. Grossman

A FRUSTRATING reality: Uncertainty is always a factor in personal finance. Still, some aspects are somewhat predictable. Among them is the connection between interest rates and other parts of the economy. Consider four key relationships:

1. Interest rates and inflation. Inflation has been the financial topic of the year. The Federal Reserve has hiked interest rates twice so far in 2022, including a larger-than-average increase last week, as it tries to rein in rising prices. It’s also communicated plans for further increases. What’s the Fed trying to accomplish?

An easy way to think about interest rates is that they’re the price of money. Suppose you want to buy a home. To be sure, there are always some people who can pay cash and don’t need a mortgage. But most do. For those folks, the interest rate is a key factor. Consider a $500,000 mortgage. At a rate of 2.75%, which was attainable last year, the monthly payment on a standard 30-year mortgage would have been $2,041. But today, with rates closer to 5.25%, the same mortgage would cost $2,761 per month.

The impact, as you might guess, is that many homebuyers will reduce the amount they’re willing to spend so they stay within their monthly budget. In fact, to get to that same $2,041 monthly payment with a 5.25% rate, the purchase price would have to drop about 25%. Result? Over time, people will bid less for homes—and prices, on average, should increase less rapidly and perhaps even fall.

This same dynamic applies to other items that need to be financed. For consumers, this includes cars. For businesses, it includes equipment purchases. Anyone looking to buy anything on credit will either want to pay less or may forgo the purchase altogether. That, in turn, will cause sellers to be more accommodating, lowering prices as needed to close sales. That’s the Fed’s goal in raising rates.

2. Interest rates and housing prices. Does that mean home prices will be cheaper tomorrow than they were yesterday? Not necessarily. Higher rates will definitely put downward pressure on prices. But there’s a countervailing force that comes into play.

When rates are higher, existing homeowners become less interested in selling. That’s because most mortgages carry fixed rates. A homeowner with a 3% mortgage may now be reluctant to sell because a new mortgage will carry a higher rate. At the margin, some number of potential sellers won’t put their homes on the market. Fewer homes will thus be available. All things being equal, that would put upward pressure on prices. How does this net out? Right now, that’s the question many folks are asking.

3. Interest rates and stocks. Interest rates also affect the stock market. This explains a large part of this year’s decline. Here’s why: According to finance theory, the value of any company should represent the sum of all its future profits, but those future profits need to be discounted. That’s because a dollar next year is worth less than a dollar today. A dollar received in two years is worth even less. And so forth. The longer a company takes to produce a dollar of profit, the less that dollar will be worth to an investor today.

That effect is compounded when interest rates rise. Here’s a mathematical example: When interest rates are 3%, the present value of a dollar of profit earned next year would be 97 cents. But if rates rise to 5%, that same dollar would be worth just 95 cents.

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Now consider how this would affect two hypothetical companies. The first is a food manufacturer that’s very profitable but doesn’t grow too quickly from year to year. The second is a software company that’s growing quickly but hasn’t yet generated a profit. When interest rates increase, the first company will fare much better than the second. That’s because a smaller portion of its profits lie in the future, where they will need to be discounted. The second company, on the other hand, which isn’t currently producing any profit, will be severely impacted, because all of its profits lie in the future and are thus subject to greater discounting. That’s why many technology stocks are down more than 50% this year, but a stable company like Procter & Gamble has fallen less than 5%.

4. Interest rates, inflation and commodity prices. This year, stocks have dropped. But gold has risen, from $1,830 at year-end 2021 to $1,882 Friday. Why? Gold is seen as a permanent store of value and thus immune to inflation. One rule of thumb, in fact, posits that an ounce of gold has always been worth the equivalent of a (fancy) men’s suit. Gold enthusiasts have shown this to be roughly accurate even going back to ancient times.

Paper currencies, on the other hand, lose value over time. We all know that, and many have felt it acutely over the past year. If we accept the idea that gold is a permanent store of value, always exchangeable into the same amount of goods, while the purchasing power of a dollar has dropped this year, then it makes sense that the price of gold has risen in dollar terms. If the Federal Reserve is successful in bringing down inflation, we should see gold prices moderate or even drop.

How do interest rates and inflation affect other commodities, such as crude oil and wheat? This has been an unusual year. Russia’s invasion of Ukraine has exacerbated existing supply chain issues, and that has driven up the price of both these commodities. But in an ordinary year, is there a connection between inflation and energy prices or food crops? There is. Just like gold, commodities tend to be permanent stores of value. It takes the same amount of wheat, for example, to make a loaf of bread today as it did 100 years ago. But dollars are worth less. The result: It takes more dollars to buy the same amount of wheat.

This is why many people view commodities as a good hedge against inflation. Trouble is, commodity prices are also subject to lots of other economic forces. Crude oil today, for example, is still 20% or so below the peak it hit back in 2008. Other commodity prices have seen similar swings. That’s why, appealing as it is in theory, I don’t see commodities as a reliable hedge against inflation.

It’s important to note that many of these relationships are interrelated. On top of that, because world events are difficult to predict, it’s still a challenge to know which way things will turn out. For example, will China back off its damaging zero-COVID policy? Will Russia back off its damaging war in Ukraine? If either or both occur, that would materially impact the economy over the coming year. And those are just two factors. For that reason, investors should always start with the assumption that anything can happen at any time—and prepare accordingly. That said, I do think it’s useful to understand the above relationships. The world is unpredictable—just not totally unpredictable.

Adam M. Grossman is the founder of Mayport, a fixed-fee wealth management firm. Sign up for Adam’s Daily Ideas email, follow him on Twitter @AdamMGrossman and check out his earlier articles.

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Nate Allen
Nate Allen
6 months ago

Adam, what is the relationship between globalization and inflation?

Mark Schwartz
Mark Schwartz
6 months ago

Adam, great explanation of the relationships between inflation and commodities. What would be your opinion on another Volker style interest rate adjustment to rein in inflation and how will the Fed afford those debt payments if a double digit interest rate is implemented? Hypothetically of course…

Jack Hannam
Jack Hannam
6 months ago

Most of us are not financial experts, and can become bewildered or even frightened by daily hysterical headlines about inflation, rising mortgage rates, falling bond prices and other financial “bad news”. And frightened investors may impulsively make unwise changes in their investments. Thank you for providing a clearly written and easily understood primer which can help many of us to better interpret these news stories, and importantly, feel more confident in “staying the course” as Bogle and so many others have counseled.

Newsboy
Newsboy
6 months ago

Adam – In another alternate universe, you are currently a HS “fundamentals of finance” teacher. This reads like a common sense, easy to comprehend primer for the 10th grade class I volunteered to teach covering this subject. Pure gold here for young and old alike. Thank you for keeping it really simple!

Last edited 6 months ago by Newsboy

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