Wall Street Shaken Again by $100 Oil

On the 12th (U.S. time), New York equity markets fell across the board as surging international oil prices and fears of a protracted war with Iran weighed on investor sentiment. The S&P 500 dropped 1.5% to 6,672.62, the Dow Jones Industrial Average fell 1.6% to 46,677.85, and the Nasdaq Composite declined 1.8% to 22,311.98.

The primary market mover was crude oil. With no end in sight to hostilities involving Iran, Brent crude spiked intraday to $101.59 a barrel—reclaiming the $100 threshold—and reignited concerns about rekindled inflation and the Fed curbing planned rate cuts. U.S. Treasury yields climbed, pressuring growth and technology shares, while fuel-intensive sectors such as airlines and cruise operators underperformed. By contrast, energy and defense stocks held up relatively well.

Economic data released that day were largely benign. Weekly initial jobless claims came in at 213,000—just below the 215,000 estimate—reinforcing the labor market’s resilience. February’s producer price index (PPI) fell 1.4% year-over-year versus an expected 1.1% decline, but the sharp rise in oil prices raised concerns that higher producer costs could eventually feed into consumer inflation.

While there were no new Fed statements or policy changes, rate-futures markets now assign a mid-90% probability to the Fed keeping rates on hold at the March 17–18 FOMC meeting. Expectations for rate cuts over the remainder of the year have eased further compared to last week.

Overall, today’s sell-off reflects a “risk-off” mood driven by Iran-related geopolitical tensions, the oil rally, and a reassessment of inflation and interest-rate paths, rather than company-specific earnings disappointments. For investors in South Korea, it may be prudent to review exposure to energy-sensitive industries and the volatility of overheated growth stocks, while keeping in mind the potential for a rebound in tech names if oil prices correct.