Markets have shifted toward higher-for-longer interest-rate expectations, pressuring sentiment after a strong run for major U.S. indexes hitting new highs earlier this month. According to CME Group’s FedWatch Tool, the probability of an FOMC rate hike by the Sept. 16 meeting jumped to 82.4% from 52.4% as of July 16.
Investors are recalibrating as a renewed energy-risk backdrop from U.S.-Iran tensions intersects with persistent underlying inflation signals and an AI-led cost cycle that could complicate the Fed’s path.
Key takeaways
- Rate-hike odds rose sharply: The probability of an FOMC rate hike by Sept. 16 increased to 82.4% from 52.4%.
- Catalyst: Escalating U.S.-Iran conflict is driving renewed energy supply concerns alongside inflation pressures tied to core measures.
- Implication for policy: Forecasts for core inflation appear resistant, raising the odds the Fed stays restrictive.
- Equities at the margin: Higher rates can slow AI infrastructure spending and force investors to reassess valuations in growth-heavy parts of the market.
What drove the rate-hike probability jump
According to CME Group’s FedWatch Tool, the market’s pricing of a near-term policy move has accelerated over roughly a week. The article points to three main drivers behind the sudden increase in rate-hike expectations.
First, energy supply risk from the Iran situation remains a live variable. The report describes how the Strait of Hormuz was closed to most maritime traffic after U.S. action against Iran five months ago, a development that disrupted a portion of global liquid petroleum demand and contributed to a rapid spike in fuel prices. It also notes that June easing—after the U.S. and Iran made progress on peace talks—pulled crude oil prices back toward pre-conflict levels and helped lower trailing 12-month U.S. inflation from 4.2% in May to 3.5% in June.
But with U.S.-Iran fighting escalating in July, the report says energy prices are rising again quickly, adding fresh inflation risk. Because energy costs feed into transportation and production expenses, the risk is not limited to pump prices.
Second, the “Trumpflation” phase appears broader than headline numbers suggest. The report argues that while headline inflation fell in June, the forecast for Core Personal Consumption Expenditures (PCE)—excluding volatile food and energy—showed little improvement. That combination, the report says, suggests the inflation impulse tied to policy and supply shocks is moving into the broader economy rather than remaining confined to energy.
Third, AI-related demand is contributing to cost pressures. The article identifies artificial intelligence as a key Wall Street driver, but argues that AI’s build-out is also raising input costs—particularly for GPUs and memory/storage—because demand is outstripping supply. It further contends that pricing power in AI hardware supply chains can translate into higher costs for downstream consumers, sustaining above-average inflation pressure.
Energy and core inflation are feeding the Fed’s decision tree
The report frames the Fed’s challenge as a balance between transient and persistent inflation components. It emphasizes that energy-driven inflation can fluctuate quickly—rising “like a rocket” and falling “like a feather”—yet the market is now focused on whether recent improvements will hold.
Even though June’s decline in headline measures eased inflation at the margin, the article points to core PCE expectations as less pliable. With core measures described as barely moving, investors appear to be pricing that the Fed could need to maintain tighter conditions to ensure inflation cools sustainably.
In practical terms for markets, a rising probability of a September hike reduces the likelihood of near-term cuts and can lift discount rates—factors that tend to weigh on longer-duration assets, especially growth stocks.
AI’s role: growth engine or inflation tail risk?
Artificial intelligence remains central to market expectations, but the report argues it may now also be a source of macro friction. On one hand, it says AI hardware demand—driving strong performance in infrastructure-related areas of the market—reflects real investment momentum. On the other hand, it notes that scarcity and pricing power in key components can raise costs across the economy.
The report further suggests a policy transmission channel: if the Fed raises interest rates, it could slow the pace of AI infrastructure expansion. That, in turn, could lead investors to re-evaluate AI growth assumptions and valuations that have historically priced in sustained high returns.
Market reaction: what investors are likely watching next
While the broader equity rally has been described as strong—major U.S. indexes reached all-time highs since early June—the report’s central message is that the policy outlook has turned less accommodating. With rate-hike odds now anchored above 80% for mid-September, investors may focus more closely on incoming inflation data, rate guidance, and evidence on whether energy volatility spills further into core services and goods prices.
In the near term, market participants will likely watch for updates on U.S.-Iran-related shipping and energy risk, additional inflation prints that clarify the trajectory of core PCE expectations, and any signals from the Fed that would either validate or challenge the current pricing implied by futures. With the FOMC meeting on Sept. 16 in focus, investors will also monitor whether new guidance changes the probability embedded in FedWatch.
