The S&P 500 Index enters the week under pressure after last week's hawkish Federal Reserve decision and a volatile ceasefire agreement between the US and Iran. While the index initially wavered as energy prices fell on hopes of de-escalation, renewed uncertainty over the deal's implementation has pushed oil prices higher again. Investors are now weighing three key catalysts that could shape market direction in the coming days.

1. US-Iran Deal Uncertainty Keeps Oil Markets on Edge

Last week, the US and Iran announced a 60-day ceasefire that was widely seen as favorable to Tehran. The agreement included sanctions relief, allowing Iran to sell crude oil at market prices, the unfreezing of billions in assets, and a commitment from Israel to halt its bombing campaign in Lebanon. In return, Iran agreed to reopen the Strait of Hormuz—a waterway that was already open before the conflict began.

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However, the deal's fragility became apparent over the weekend. Iran stated it would not send a delegation for further talks, citing the Lebanon issue, and subsequently closed the Strait of Hormuz again. This reversal pushed Brent and West Texas Intermediate (WTI) crude prices back above $80 per barrel. For the S&P 500, energy sector volatility remains a key risk, as higher oil prices can feed into inflation expectations and weigh on consumer spending. The dollar index steadied near 99 as markets digested these developments.

2. Micron Earnings: A Bellwether for the Memory Chip Sector

Micron Technology, now a member of the trillion-dollar market cap club, reports fiscal third-quarter results on Wednesday. The company's performance is closely watched because it sits at the heart of the memory chip boom that has driven some of the S&P 500's biggest gainers, including Sandisk, Western Digital, and Seagate.

Analysts expect strong revenue growth driven by demand for AI-related memory and data center upgrades. However, any disappointment could trigger a broader sell-off in the semiconductor space, as seen after Broadcom's recent earnings. Investors will focus on forward guidance and commentary on supply chain dynamics. Other notable earnings this week include Paychex, Darden Restaurants, and FedEx.

3. May PCE Report: Inflation Data in the Spotlight

The Federal Reserve's preferred inflation gauge, the Personal Consumption Expenditures (PCE) price index, is due Thursday. Economists forecast the headline PCE to rise 4.0% year-over-year in May, up from 3.8% in April. Core PCE, which excludes food and energy, is expected to hold steady at 3.3%.

While the PCE report arrives after the Fed's latest rate decision, it remains critical for shaping expectations about the central bank's next moves. A hotter-than-expected reading could reinforce the hawkish stance that pushed two-year Treasury yields to multi-year highs last week. Conversely, a softer print might ease some pressure on equities. The dollar index is eyeing a breakout as the Fed prioritizes inflation control over rate cuts.

Together, these three catalysts—geopolitical risk, corporate earnings, and inflation data—will likely determine whether the S&P 500 can stabilize or extend its recent decline. Investors should monitor oil price movements, Micron's guidance, and the PCE release for near-term market direction.

This article is for informational purposes only and does not constitute financial advice.