Third-Quarter Markets: Inflation, Rates, and Energy

The U.S. economy showed resilience during the third quarter, but the picture was not all rosy. Hiring slowed sharply, while consumer spending picked up. At the same time, the U.S.-Iran conflict drove fuel prices higher and kept inflation elevated. In September, the Federal Reserve raised rates for the first time since 2023.

Stocks ended the quarter modestly higher, even as the 10-year Treasury yield reached its highest level since 2007. Higher yields raised borrowing costs and tested the lofty valuations behind the AI rally. For individuals and families working to organize their finances, the quarter underscored the value of understanding how economic developments can affect a personalized financial plan.

Quarter-End Results Across Major Stock Indexes

• The S&P 500 climbed 2.03%.
• The Nasdaq 100 edged up 0.44%.
• The Dow Jones Industrial Average slid 2.70%.

The differing results reflected a quarter in which stocks moved higher overall while interest rates and borrowing costs continued to shape market conditions.

Diesel Prices and the Broader Economy

The U.S.-Iran conflict made diesel the quarter’s most telling price. Diesel powers the trucks, trains, ships, and farm equipment that keep the economy supplied, and late in the quarter, it topped $6 a gallon nationally for the first time. The increase reflected more than expensive crude. Ukrainian strikes on Russian refineries, Iranian attacks on tankers, and Moscow’s export ban sharply cut global diesel supply.

Unlike gasoline, diesel costs are built into nearly everything consumers buy. Businesses can absorb higher fuel bills only for so long before passing them on through freight charges, food prices, and delivery fees. Consumers kept spending, but they grew more anxious about prices, and the diesel spike may help explain why. Even households that never buy a gallon at the pump are paying for it at the checkout.

For people considering budgeting and debt planning, these costs are a reminder that changes in energy prices can affect routine household expenses in ways that are not always visible at the pump.

Energy Costs Kept Inflation Elevated

Energy costs kept inflation from cooling enough to satisfy the Fed under Chair Kevin Warsh. Set food and energy aside, the picture looked steadier. Underlying price increases held roughly level for months, a sign that the broader economy was not overheating.

But with demand holding up and fuel costs still climbing, overall inflation remained well above the Fed’s 2% goal. By late summer, policymakers concluded that waiting carried more risk than acting.

The Federal Reserve’s September Rate Increase

At its September meeting, the Federal Reserve raised rates for the first time in three years, moving the benchmark federal funds rate to 3.75%–4%. The increase itself was modest, but the signal behind it drew attention. Policymakers indicated that another increase could come before year-end and that rates would likely stay high through 2027.

Bond investors responded quickly, pushing long-term Treasury yields to levels not seen since 2007 and lifting borrowing costs across the economy. For savers, this is welcome news. Money market funds, CDs, and short-term bonds now pay noticeably more. Borrowers are facing the opposite, as mortgages and car loans grow costlier.

For households evaluating retirement planning, investment management, or a potential 401(k) or IRA rollover, changing rates can be one factor to review alongside personal goals, timelines, and circumstances.

Events to Watch in the Fourth Quarter

The Fed’s late-October and early-December meetings are among the quarter’s biggest events. Monthly data releases will also continue to offer insights into how inflation affects consumers.

The third quarter showed that a strong economy does not always make for an easy market. Energy prices, inflation, interest rates, and borrowing costs all remained part of the market picture.

Putting Market Developments in Personal Context

Market and economic news can raise important questions about investments, retirement planning, taxes, education expenses, debt, and long-term wealth-building goals. The appropriate next step depends on each person’s financial situation and objectives.

Eden Financial is an independent, fee-only fiduciary financial planning firm in Aliso Viejo serving individuals, families, professionals, women, and business owners throughout Orange County. Our team can help you review your portfolio, revisit your goals, and discuss the questions that matter to your financial life. Schedule a financial planning consultation with Eden Financial for personalized guidance and support.