Trumpflation Is Getting Worse and It Could Trigger a Wall Street Nightmare
Inflation was supposed to be yesterday's problem, but overlapping pressures from Trump's war, tariffs, and an AI spending frenzy are forcing the Fed toward a decision that could turn Wall Street's hottest rally into its biggest liability.
Inflation was supposed to be yesterday’s problem. After peaking above 9% in 2022, consumer price increases steadily cooled, giving Americans hope that the worst was behind them. Wall Street had another reason to celebrate: Falling inflation meant lower interest rates, cheaper financing, and more fuel for the artificial intelligence boom driving stocks higher.
Unfortunately, that happy ending is looking increasingly unlikely. Prices are accelerating again, President Trump’s Iran war and his trade policies are adding to the pressure, and the Federal Reserve is moving in the wrong direction for investors expecting cheaper money. The danger isn’t merely another inflation spike. It’s that fighting inflation could undermine the very investment boom supporting today’s stock market.
Trumpflation Is Spreading Beyond Tariffs
The latest numbers show why the Fed has a problem. According to the Bureau of Economic Analysis, September’s personal consumption expenditures (PCE) price index rose 3.6% annually, up from 3.4% in August. Core inflation, which excludes volatile food and energy costs, accelerated to 3.1%. Both remain above the Fed’s 2% target.
Trump’s tariffs added to the pressure. Federal Reserve Bank of New York research found American businesses and consumers absorbed nearly 90% of the economic burden of tariffs imposed in 2025.
But the Iran war is playing a larger role today. The Energy Information Administration reported Brent crude oil averaged $114 per barrel in September, up $23 from August, as Middle Eastern supply disruptions intensified. Gasoline prices jumped 9.1% that month, accounting for more than half the increase in consumer prices.
And expensive oil doesn’t stop at the gas pump. Higher diesel, shipping, and manufacturing costs work their way through the economy, raising prices for everything from groceries to delivered goods.
As families pay more and buy less, these overlapping pressures threaten to keep inflation elevated long after the initial shocks.
The Fed Could Become Wall Street’s Worst Enemy
The Federal Reserve’s Oct. 28 meeting offered investors a warning. Although policymakers held benchmark interest rates at 3.75% to 4.00%, the decision passed 10–2. Fed Governor Lisa Cook and Cleveland Fed President Beth Hammack wanted another quarter-point increase. That followed September’s unanimous quarter-point hike.
The central bank isn’t debating how quickly to cut rates. It’s confronting the possibility that borrowing costs must climb further. And there is evidence the inflation problem is becoming harder to contain. Demand-driven inflation has reached its highest contribution in three years, suggesting price pressures aren’t limited to imported goods.
Meanwhile, the BEA reported September consumer spending rose 0.5% in dollar terms, yet real spending was essentially unchanged. Real disposable income actually fell 0.3%. Families spent more money without meaningfully purchasing more goods and services. That’s an uncomfortable combination for the Fed — and potentially worse for stocks.
The AI Boom Has an Interest Rate Problem
The biggest threat may be hiding inside Wall Street’s favorite investment. Artificial intelligence infrastructure spending could approach $1 trillion annually by 2027, but the companies financing that expansion have very different balance sheets.
Alphabet (NASDAQ:GOOGL | GOOGL Price Prediction), with roughly $100 billion in annual cash flow, can absorb higher borrowing costs more easily than CoreWeave (NASDAQ:CRWV), which carries approximately $35 billion in debt and recently incurred $640 million in quarterly interest costs.
As the AI spending boom puts more pressure on interest rates, heavily indebted companies face an uncomfortable choice: borrow more expensive money or scale back expansion plans. Neither is particularly attractive to investors pricing stocks for years of uninterrupted growth.
Higher interest rates also reduce the present value of expected future earnings, putting pressure on richly valued technology stocks even when their businesses continue growing.
Ironically, AI investment that helps fuel economic growth could help keep inflation elevated, provoking the very rate increases that threaten its expansion.
Key Takeaway
In short, Trump’s war and tariffs are adding to an inflation problem that increasingly extends beyond the price of oil and imported goods. If the Fed must raise rates aggressively, Wall Street’s AI-driven rally could face its toughest test yet.
That doesn’t mean abandoning technology stocks. But the nightmare isn’t that artificial intelligence fails. It’s that AI succeeds, but the financing behind its expansion becomes too expensive to sustain today’s valuations.
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After two decades of patrolling the dark corners of suburbia as a police officer, Rich Duprey hung up his badge and gun to begin writing full time about stocks and investing. For the past 20 years, he’s been cruising the markets looking for companies to lock up as long-term holdings in a portfolio while writing extensively on the broad sectors of consumer goods, technology, and industrials. Because his experience isn’t from the typical financial analyst track, Rich is able to break down complex topics into understandable and useful action points for the average investor. His writings have appeared on The Motley Fool, InvestorPlace, Yahoo! Finance, Money Morning, and, of course, 24/7 Wall St. He has been featured in both U.S. and international publications, including MarketWatch, Financial Times, Forbes, Fast Company, and USA Today.
