Oil, yields spike, stocks fall as U.S.-Iran resume war

Melisa R. H. Posted On August 31, 2026

Stocks headed south on Monday after the U.S. and Iran resumed fighting. The S&P closed -0.33%, the Nasdaq -0.12%, the Dow 0.7% and the TSX 0.78% or 283 points. Meanwhile, WTI crude jumped 3% to US$86 while the U.S. 10-year yield spiked to 4.758%.

In Toronto, energy was by far the strongest sector as Vermilion Energy rallied 2.36% and CNQ 1.98%. Real estate, tech and materials led with sectors lower as ERO Copper sank 4.48% and Lundin Mining fell 4.45%. NFI Group surged 3.1%. Silver edged up by 0.22% to US$66.40 while gold slipped $7 to US$4,448. In New York, Crowdstrike jumped 5.77%, Tesla 5.51%, Amazon -2.5% and Aon -9.53%. Meanwhile PG&E cratered 20.06%.

🛢 Vermilion Energy Inc (VET.TO) +2.36%

🛢 Canadian Natural Rsrcs (CNQ.TO) +1.98%

⛏ Ero Copper Corp (ERO) -4.48%

⛏ Lundin Mining Corp. (LUN.TO) -4.45%

🚚 NFI Group (NFI.TO) +3.1%

💾 CrowdStrike Holdings (CRWD) +5.77%

🚗 Tesla Inc (TSLA) +5.51%

📦 Amazon.com, Inc. (AMZN) -2.5%

🏛 Aon Corp. (AON) -9.53%

💡 PG&E Corp (PCG) -20.06%