Toronto's stock market took a hit Thursday morning, with the S&P/TSX Composite falling 261.51 points to 36,150.21. The main culprit: a sharp drop in metals prices, from copper to gold to silver, which weighed heavily on Canada's mining-heavy benchmark.
Why metals matter so much to the TSX
Canada's flagship index has a large materials component, so when commodity prices fall, the whole market can feel it. On Thursday, the S&P/TSX base metals group dropped 3.3% after December copper futures fell 2.1%. That might seem like a small move in copper, but it translated into a much bigger swing in mining shares.
This amplification isn't unusual. Mining companies have high fixed costs—once a mine is running, many expenses don't shrink much when prices drop. So a modest decline in selling prices can cut expected profit margins significantly. That's why miners often react more sharply than the underlying metal, a concept known as operating leverage. When a benchmark like the S&P/TSX has meaningful exposure to these companies, a metals slide can turn into an outsized index move, even if other sectors are doing fine.
Precious metals also under pressure
Precious metals didn't offer much shelter either. Gold fell 3.4% and silver sank 4.4%. The driver appears to be growing expectations that the US Federal Reserve may raise interest rates next month. Higher rates tend to support the US dollar and make interest-paying assets more attractive, which pressures metals that don't generate income.
For everyday investors, this is a reminder that gold and silver aren't always safe havens. When rate hike expectations rise, these metals can lose their shine as investors shift toward yield-bearing investments.
Mixed signals elsewhere
Outside commodities, the tone was softer at home. Statistics Canada reported that September building permits fell 4.1% to CA$12.9 billion, led by weaker residential construction. That's a sign that the housing sector may be cooling, which could have broader economic implications.
But there were bright spots. Information technology stocks rose 1.2%, even as news broke that Nvidia CEO Jensen Huang had resigned. The tech sector's resilience suggests that investors are looking past the leadership change at the chipmaker, at least for now. For context, Nvidia's leadership uncertainty has rattled markets elsewhere, as seen in Canadian futures and Asian tech shares, but Toronto's tech names held up.
One standout was Cargojet, a Canadian cargo airline, which jumped 9.4% to CA$107.84 after topping expectations for adjusted earnings and revenue. That's a reminder that even on a down day, individual stocks can shine on strong fundamentals.
What it means for investors
For investors, Thursday's move highlights how a single commodity can drive the entire index. When you own a broad market fund like one tracking the S&P/TSX, you're exposed to the ups and downs of mining stocks, even if you didn't intend to bet on copper or gold.
It also underscores the importance of diversification. While materials dragged the index lower, tech and Cargojet provided some offset. A portfolio that's too concentrated in one sector can be vulnerable to exactly this kind of day.
Looking ahead, investors will likely watch for any signals from the Fed about rate hikes. If rate expectations continue to rise, metals could stay under pressure, and the TSX may continue to feel the pinch. On the other hand, if the Fed signals a pause, metals could rebound quickly.
For now, the takeaway is simple: commodity prices can be volatile, and that volatility often shows up in the stock market in amplified ways. Keeping an eye on metals—and the Fed—can help you understand why your portfolio moves the way it does.
