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North American stock markets opened on a downbeat note on Thursday, influenced by a rise in oil prices and a resurgence in treasury yields, all set against the backdrop of the ongoing stand-off between Iran and the United States. Elevated treasury yields are known to dampen economic activity, adversely affecting investment prices across the board, including stocks and cryptocurrencies. This trend raises concerns over the potential impact on borrowing costs for companies, particularly those investing in artificial intelligence data centres that have been pivotal to recent economic growth.
Treasury Yields on the Rise
The yield on the 30-year U.S. Treasury bond, a key indicator of fiscal and geopolitical risk, increased by 1.7 basis points to reach 5.139 per cent. Earlier this week, it briefly peaked at 5.197 per cent, marking its highest point since July 2007, just prior to the global financial crisis. The higher yields reflect market apprehensions surrounding the geopolitical landscape, particularly as tensions between Iran and the U.S. continue to escalate.
In early trading, major indices like the S&P 500, Dow Jones Industrial Average, and Nasdaq all saw declines of approximately half a per cent. Meanwhile, the Toronto Stock Exchange experienced a reduction of around a quarter of one per cent.
Oil Prices Increase Following Volatility
On the oil front, prices surged after a significant drop earlier in the week. Brent crude, the international benchmark, rose nearly US$4 to approach $109 per barrel, while U.S. benchmark WTI crude saw an increase of $4 to reach $102 per barrel. These prices remain well above the approximately $70 per barrel level recorded before the conflict with Iran escalated. The fluctuations are largely driven by fluctuating expectations regarding the potential for a diplomatic resolution to the Iranian crisis, which would enable a return to more stable oil deliveries from the Persian Gulf.

Corporate Performance Under Scrutiny
In corporate news, shares of Walmart experienced a notable decline of over six per cent following the retailer’s latest earnings report. Although the company posted a robust quarter in sales, it provided a less optimistic outlook than analysts had anticipated. This downturn comes as American consumers grow increasingly wary about their spending habits, particularly in light of rising inflation, which has been exacerbated by the recent conflict in Iran.
Simultaneously, Nvidia’s stock fluctuated between slight gains and losses after the chipmaker released its quarterly results, which once again exceeded Wall Street’s expectations. The immense demand for its advanced AI chips led to an astonishing 85 per cent increase in revenue, while profits more than tripled compared to the previous year.
The Impact of Rising Yields
Following a brief respite, treasury yields resumed their upward trajectory on Thursday, with the yield on the 10-year Treasury climbing back to 4.60 per cent after having dipped to 4.57 per cent a day earlier. Earlier in the week, this yield had reached as high as 4.67 per cent. The persistent rise in yields, which had been below four per cent before the outbreak of hostilities with Iran, reflects global anxieties that sustained conflict will keep oil prices elevated, further straining economic conditions.

The market had seen a brief relief when U.S. President Donald Trump indicated that peace negotiations with Iran were nearing completion, leading to a temporary drop in yields. However, as the geopolitical landscape remains uncertain, investors remain cautious.
Why it Matters
The current volatility in North American markets underscores the intricate relationship between geopolitical events and economic trends. As tensions between Iran and the U.S. continue to influence oil prices and treasury yields, businesses and consumers alike may face increased financial pressures. The potential for rising borrowing costs could hinder corporate investments and slow economic growth, making it imperative for stakeholders to monitor developments closely. As markets navigate these challenges, the ripple effects could be felt across various sectors, highlighting the interconnectedness of global economies.