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Saturday, July 18, 2026 U.S. Edition
S&P 500 Market Overview: IBM -25% Plunge and Oil Surge Shake Market
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S&P 500 Market Overview: IBM -25% Plunge and Oil Surge Shake Market

SPY SPDR S&P 500 ETF $746.07 +2.78 (+0.37%) Market Closed Mkt Cap P/E 1.01% Yield $760.40 52W High

Will the sudden AI fatigue and geopolitical oil shocks drag the S&P 500 even lower next week?

The week was defined by two primary catalysts: escalating tensions in the Strait of Hormuz and a sudden rotation out of high-flying technology names. Geopolitical friction intensified as President Donald Trump announced the reinstatement of the Iranian blockade, causing oil prices to spike. Simultaneously, a wave of AI fatigue swept through the semiconductor sector, triggered by disappointing preliminary results from IBM and a sell-off in memory-chip makers. While major banks kicked off the second-quarter earnings season with robust results, the positive momentum was overshadowed by tech-sector profit-taking.

How Did the S&P 500 Market Overview Move This Week?

The SPDR S&P 500 ETF Trust (SPY) experienced a volatile, range-bound week, ultimately finishing down -1.2% from Monday’s opening price of 752.47 to Friday’s close of 743.29. The index hit a weekly high of 755.58 on Wednesday, buoyed by surprisingly tame inflation data, before sliding to a weekly low of 740.80 on Friday. With no single day registering as a major outlier, the week was characterized by a steady mid-week recovery that was quickly erased by a late-week sell-off in megacap technology stocks.

Will Geopolitics Keep Pressure on Energy Markets?

The week started under pressure as President Donald Trump announced the reinstatement of the Iranian blockade in the Strait of Hormuz. This geopolitical shock caused West Texas Intermediate crude oil futures to spike nearly 9% on Monday, climbing above $78 a barrel. Energy stocks within the S&P 500 advanced strongly, with Raymond James raising its price target on Marathon Petroleum to 335 from 300, while Valero and Phillips 66 also posted solid gains as investors sought defensive positioning amid shipping disruptions.

Is the Artificial Intelligence Boom Cooling Down?

A major theme was the growing skepticism over massive AI capital expenditures. IBM sent shockwaves through the market, plunging 25% on Tuesday after preliminary earnings missed expectations due to what CEO Arvind Krishna called “AI-driven capex reprioritization.” This shift hit mainframe sales hard. Additionally, memory-chip makers faced brutal selling pressure. Despite Taiwan Semiconductor Manufacturing Co. beating estimates with Q2 earnings of $4.31 per share, its stock fell as the company raised capital expenditure plans, raising margin concerns. Analysts like Peter Schiff questioned if the decline of SpaceX, which briefly fell below its 135 IPO price, signals that the bloom is coming off the AI rose.

How Did Big Banks Perform as Earnings Season Began?

Financials offered a bright spot. While tech faltered, a key part of the S&P 500 Market Overview found support in the financial sector. Major institutions like JPMorgan Chase, Goldman Sachs, and Bank of America reported double-digit earnings growth. Goldman Sachs jumped above a short-term trendline, while JPMorgan Chase remained in a buy zone. Superregional banks like PNC Financial also posted strong results, with PNC forecasting 13% revenue growth for the year, showing robust fee income and commercial loan growth.

What Should Investors Watch Next Week?

Next week, the focus remains squarely on corporate earnings and monetary policy. Investors will analyze finalized Q2 results from IBM on July 22 to see if the capex reprioritization trend persists. Furthermore, the market will continue to digest the latest comments from Federal Reserve Chair Kevin Warsh, who faces a challenging task as sticky inflation and geopolitical shocks complicate the path of interest rates.

For deeper insights into how macroeconomic policy is shaping the markets, read our analysis on the Federal Reserve Rate Outlook: Inflation Warning Grows. Additionally, to understand how technology valuations are impacting broader indices, explore our report on how QQQ Stock Rises as Tech Giants Drive Nasdaq 100 Higher.

Simply beating consensus estimates… may no longer be enough to result in positive near-term stock performance.
— Scott Wren, Senior Global Market Strategist at Wells Fargo Investment Institute
Conclusion

Ultimately, this week’s S&P 500 Market Overview highlights a market in transition. While geopolitical tensions and AI-related profit-taking created short-term headwinds, the underlying strength in bank earnings and resilient economic data suggest that the broader market remains on solid footing. For disciplined investors, the current consolidation may offer attractive entry points in diversified sectors as the market’s gains begin to broaden beyond tech.

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Maik Kemper

Maik Kemper is the founder and editor-in-chief of Stock Newsroom. Active in the markets since the age of 18, he combines hands-on trading experience across forex, equities and cryptocurrencies with financial journalism. His focus: quarterly earnings analysis, corporate strategy, and macroeconomic trends.

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