Understanding Inflation and Interest Rates

IN THIS ARTICLE

• Inflation and Interest Rates Overview
• How Inflation and Rates Work Together
• Impact on Your Investments
• Real Interest Rate Explained
• How LPL Helps Investors

Inflation and interest rates shape how the economy and markets behave. They influence how much it costs to borrow or save money, how businesses operate, and how investments perform. When inflation rises, the value of money falls. When interest rates change, the effects show up in mortgages, credit cards, bond returns, and stock prices.

Understanding how these forces work together can help investors make better sense of market moves and avoid reacting emotionally to short-term changes.

Inflation and Interest Rates Overview

• Inflation measures how fast prices rise. Interest rates are the cost of borrowing money.
• The Federal Reserve adjusts rates to steer inflation toward its 2% target.¹
• Rates and inflation usually move in the same direction.
• Bond prices generally move in the opposite direction from interest rates.
• A long-term plan matters more than reacting to any single economic report.

How Inflation and Interest Rates Work Together

Inflation describes how prices for everyday goods and services increase over time. When inflation rises, the same amount of money buys less than it did before. People often notice it first through higher grocery bills, rent increases, or rising gas prices.

Economists track inflation using measures like the Consumer Price Index (CPI), which follows the cost of commonly purchased items.² A modest level of inflation usually signals a growing economy. Problems arise when prices climb too fast, straining household budgets and eroding savings.

Inflation generally comes from three main sources:

• Demand-pull inflation happens when consumers want to buy more than the economy can produce, pushing prices higher.
• Cost-push inflation occurs when production costs rise and businesses pass those costs on to consumers.
• Built-in inflation occurs when workers and businesses expect prices to keep rising, so wages and prices climb in a self-reinforcing cycle.

Interest rates reflect the cost of borrowing money and the return earned on savings. When you take out a loan, you pay interest. When you save money, you earn it.

The Federal Reserve (Fed) plays a central role by setting a key short-term rate that influences many other interest rates across the economy. When the Fed raises rates, borrowing becomes more expensive. Mortgages, auto loans, and credit cards typically cost more, which can slow spending and investment. On the positive side, savers often earn better returns on savings accounts and bonds.

When inflation runs too high, the Fed typically raises interest rates to cool demand. Higher rates reduce consumer spending and business investment, which can help bring inflation back down. Conversely, when the economy slows and inflation falls too low, the Fed may lower rates to stimulate growth. Lower rates make borrowing cheaper, encouraging spending and investment. Rate adjustments take time to work through the economy.

Bottom Line: Rates and inflation tend to rise and fall together because the Fed uses rate policy to keep prices stable.

The Impact of Interest Rates on Your Investments

Rising interest rates can make borrowing more expensive for companies, potentially slowing corporate earnings and market growth. When businesses face higher costs to finance operations, profit margins may shrink, weighing on stock prices, particularly for growth companies that rely heavily on borrowing.

Different sectors respond differently to rate environments. Financial companies often benefit from higher rates through improved lending margins, while energy companies may perform well during inflationary periods.

First, the Good News

Higher rates lift the yields you can earn on cash and newly issued bonds. Research from the National Bureau of Economic Research notes that a cut in interest rates pushes up the stock market.³

Now, the Bad News

Bond prices generally move inversely to rates, so existing bonds lose value when rates climb. Short-term market reactions to inflation reports or Fed announcements can be sharp. However, investors often benefit from focusing on long-term strategy rather than reacting to every fluctuation. Market cycles come and go, and the stock market's daily moves reflect shifting expectations rather than fundamental changes to business quality.

Rate moves are not a reason to react. They are a reason to review your allocation with an advisor.

Bottom Line: No single asset class reacts the same way, so a diversified plan matters more than any single rate decision.

What Is the Real Interest Rate?

The rate that makes headlines is the short-term federal funds rate set by the Fed, but there's one more rate worth knowing: the real interest rate. This is the stated, or nominal, rate minus inflation.

Real interest rate = nominal interest rate − expected inflation rate.

This formula calculates how much your money actually grows in purchasing power. Say the Fed holds its benchmark rate at 4.5% while inflation runs at 3%. The real rate is about 1.5%, so a saver who is earning yields tied to the Fed's rate gains only about 1.5% in actual purchasing power. Now suppose inflation climbs to 4.5% while the Fed rate holds steady. The real rate drops to zero, and that same saver is treading water. The account earns interest every month, but the balance buys no more than it did a year ago.

Bottom Line: Focus on real returns, not just headline rates, when you judge whether your savings are keeping up with inflation.

How LPL Financial Helps Investors Navigate Inflation and Interest Rates

LPL Financial advisors help clients understand and respond to changing economic conditions. When inflation surges or interest rates shift dramatically, advisors can explain what these changes mean for individual portfolios and long-term plans through asset allocation and income planning. This tailored approach helps clients stay focused on long-term goals, even during volatile periods when headlines might tempt emotional reactions.

Bottom Line: Understanding the mechanics is the start. Deciding what to do about them is where an advisor adds the most value.