Oil prices have surged to six-week highs, with Brent crude reaching $97.31 per barrel and West Texas Intermediate at $92.66, driven by escalating military conflict between the U.S. and Iran. This increase in energy costs is reigniting concerns about inflation and the likelihood of a Federal Reserve interest rate hike. Traders are currently pricing in a 60% probability of a quarter-point rate increase by the Fed next week, a sentiment that could be further solidified by upcoming inflation data, including the Producer Price Index and Consumer Price Index, later this week.

Simultaneously, Canada's retaliatory tariffs on approximately $20 billion worth of U.S. goods have taken effect. These tariffs, ranging from 15% to 50% on hundreds of products including steel, aluminum, dairy, and consumer items, intensify an ongoing trade war. Canadian Prime Minister Mark Carney's government aims to strengthen its negotiating position with the U.S., while President Donald Trump has threatened further escalation, including a potential increase to 50% on Canadian cars and auto parts starting in January, and has demanded that Bombardier manufacture in the U.S. to avoid being barred from the American market.

The confluence of rising oil prices and the U.S.-Canada tariff dispute has significantly impacted financial markets. Dow futures plunged over 300 points on the first trading day after the Labor Day holiday, reflecting investor concerns over both resurgent inflation and the expanding trade war. The benchmark 10-year Treasury yield rose to its highest level since November 2023, and the rate-sensitive 2-year yield climbed to its highest since January 2025, as strong nonfarm payrolls data and elevated energy prices pushed up rate-hike expectations. Analysts note that these simultaneous pressures create a challenging environment for global equity markets, with inflation data, the Fed's decision, oil price trends, and the U.S.-Canada trade war all contributing to market uncertainty.