Oil, AI, and Trade: What moved markets
Feb 15-20, 2026
Markets this Week
S&P 500: +1%
Nasdaq: +1.5%
Oil (WTI): +6%
Oil Stocks Jump on Iran Tensions
Oil prices jumped 6% between Feb 18-20 after rising US-Iran tensions increased risk of supply disruption. The Straight of Hormuz, a key global oil shipping route, was disrupted for the first time since the 1980s. Iran had temporarily closed parts of the strait on Feb 17 for military drills, raising geopolitical tensions in the energy markets.
Why markets reacted
US-Iran tensions increased the risk of oil supply disruption, pushing oil prices higher. Energy companies sell oil at market price, therefore higher crude increases their benefits. As crude rose, investors bought energy stocks anticipating more earnings.
Why it matters
Because so much global oil flows through the Strait of Hormuz, any disruption in the region can quickly affect inflation and interest rates worldwide.
AI Momentum Lifts Markets
AI tech stocks rose Feb 17–20, led by Nvidia and other megacap firms, as investors positioned ahead of major AI earnings. Tech companies announced increased AI spending in the future and chipmakers, data-center suppliers, and cloud providers outperformed their anticipated earnings. These events pushed the Nasdaq higher during the week.
Why markets reacted
Markets expect tech driven companies to invest more in AI technology, especially in chips, data centers, and cloud computing. Therefore more investment is put into these companies, increasing revenue in the future. As these firms make up a large share of tech indexes, investors buying in AI leaders increased market gains.
Why it matters
AI companies are making up a larger share of major indexes like the S&P 500. Stronger performances in this sector will significantly increase the overall market gains.
Tariffs & Trade Boost Stocks
Stock prices surged on Feb 20 after the Supreme Court struck down major tariffs, removing key trade barriers installed by Trump. The “trafficking” tariffs were created to stop the flow of fentanyl into the United States. The ruling reduced import costs for companies reliant on international trade. Lower tariffs improve global trade and are expected to reduce import costs, increasing international commerce.
Why markets reacted
Tariffs raise costs for companies that import materials or sell goods globally. They reduce costs for companies and their consumers. Without them, profits and economic growth thrive. The global companies led market gains following the decision on Friday.
Why it matters
If trade restrictions disintegrate even further, lower costs and stronger global trade can boost the worldwide economy going forward.
Looking Ahead,
Investors will focus on AI earnings, oil price moves, and trade policies.
Another big week for markets, broken down in 5 minutes.
Stay tuned for next week’s market recap!
— The WallstreetWagon Team
So insightful and useful!