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Marathon Weekly Insights - March 9, 2026

March 10, 2026

Market Summary: Geopolitical Tension Weighs on Sentiment

U.S. equities experienced a difficult week as a sharp surge in oil prices and the escalating conflict involving Iran weighed heavily on investor sentiment.

Rising geopolitical tensions, higher energy prices, and renewed inflation concerns dominated market activity and overshadowed otherwise solid economic data earlier in the week.

Geopolitical Developments and Oil Prices

The primary catalyst for market weakness was a rapid escalation in Middle East tensions. Military strikes targeting senior Iranian leadership triggered retaliatory attacks across the region and raised concerns about the security of global oil supply routes. Tanker traffic through the Strait of Hormuz slowed significantly, fueling fears of supply disruptions to a corridor that normally carries roughly 20% of global oil supply.

As a result, crude oil prices surpassed $90 per barrell, marking one of the largest weekly increases in recent years. The sharp rise in energy prices prompted concerns that higher fuel costs could spread through the economy via transportation expenses, input costs, and consumer prices.

From a market perspective, rising oil prices have quickly become a key constraint on equity valuations. Higher energy costs increase inflation risk and reduce the likelihood of near-term Federal Reserve rate cuts.

Investors generally view oil prices near $80 per barrel as manageable, but a move toward $100 per barrel, like we saw over the weekend, could significantly intensify inflation pressures and weigh more heavily on economic growth and corporate earnings.

Sector Performance

The spike in oil prices created a challenging backdrop for most equity sectors. The energy sector was the only major group to finish the week higher (+1.0%), benefiting directly from rising crude prices. Most other sectors posted meaningful declines as investors assessed the implications of higher energy costs for corporate margins and economic growth.

Technology-related areas showed relative resilience. Strength in enterprise software companies stood out with a bit of a relief rally, while semiconductor stocks faced heavier selling as investors reduced exposure to cyclical growth areas during the week’s volatility.

Economic Data and Federal Reserve Outlook

Economic data released during the week provided a mixed picture. Early reports indicated continued expansion across both manufacturing and services activity, and the Federal Reserve’s Beige Book suggested most districts expect modest economic growth in the coming months.

The February employment report complicated the outlook. Nonfarm payrolls unexpectedly declined by 92,000, while the unemployment rate edged up to 4.4%. At the same time, average hourly earnings rose 0.4%, highlighting persistent wage pressures.

This combination of weaker job growth and firm wage inflation presents a challenging backdrop for policymakers.

 Rising oil prices further complicate the outlook by increasing the risk that inflation remains elevated even as labor market momentum softens.

As a result, markets increasingly expect the Federal Reserve to remain cautious and delay rate cuts until there is clearer evidence that inflation pressures are easing.

Market Volatility and Key Market Levels

Despite the conflict, the U.S. market has shown relative resilience compared with several global markets that are more dependent on energy imports. Investors are increasingly focused on several key thresholds that could signal greater economic and market stress if crossed.

Three indicators appear particularly important: oil prices, Treasury yields, and the S&P 500 itself. Oil approaching or surpassing $100 per barrel, the 10-year Treasury yield moving toward or above 4.50%, or the S&P 500 falling below roughly 6300 (a correction of more than 10%) would likely represent meaningful pressure points for both markets and policymakers. Crossing these levels could signal rising inflation risks, tighter financial conditions, and greater downside risk for economic growth.

Historical Perspective and Investing

While the current conflict has increased uncertainty, history shows that financial markets have generally demonstrated resilience during geopolitical shocks. Tensions involving Iran and global oil supply are not new.

Past episodes – including the Iranian Revolution, the Tanker War throughout the 1980s, and the Attack on Saudi Aramco facilities in 2019 – all caused sharp but typically temporary spikes in oil prices and market volatility.

 In most cases, equity markets recovered once supply disruptions eased and geopolitical tensions stabilized.

Historically, markets tend to react quickly to geopolitical headlines but often stabilize once the economic impact becomes clearer.

Corporate earnings, economic growth, and long-term innovation typically play a larger role in determining market direction than short-term geopolitical events.

For long-term investors, periods of heightened volatility reinforce the importance of maintaining a disciplined investment approach. Attempting to time geopolitical developments is extremely difficult, and markets often rebound before the underlying situation is fully resolved.

Staying diversified and invested through uncertainty has historically been one of the most effective ways to navigate geopolitical shocks.

Week Ahead

Looking ahead, markets will continue to monitor geopolitical developments in the Middle East and movements in energy prices, which remain the most immediate drivers of investor sentiment. Any signs of stabilization in oil markets or progress toward securing shipping routes through the Strait of Hormuz could help ease inflation concerns and support a rebound in risk assets.

Economic data will also take center stage in the coming week, with several key inflation and activity indicators likely to influence expectations for Federal Reserve policy. In particular, investors will closely watch upcoming consumer and producer inflation reports for signs of persistent price pressures, though these readings will not yet fully capture the recent surge in energy prices.

Additional reports on consumer spending, industrial activity, and housing conditions will provide further insight into the underlying strength of the U.S. economy. At the same time, movements in Treasury yields will remain an important barometer for financial conditions and equity valuations.

Taken together, the combination of geopolitical headlines, inflation data, and interest rate movements is likely to keep volatility elevated. However, markets will ultimately be looking for signs that energy prices are stabilizing and that economic growth remains resilient despite the current uncertainty.

As always, please reach out to us for any questions and thank you for your trust.

Respectfully,

Michael Neill, CFA