Canadian stocks erased all 2026 gains as gold producers' shares collapsed and traders questioned if central banks will cut rates amid inflation from the Iran conflict. The Toronto Stock Exchange's benchmark index lost momentum after gold prices tumbled, hitting producers like Barrick Gold and Newmont Corp. hard. Traders now bet central banks won't rush to cut rates, fearing inflation from the war could persist longer than expected. This shift reflects growing concerns that global economic growth may slow more than anticipated, pressuring corporate earnings and market optimism. The TSX's reversal underscores how geopolitical risks can quickly reverse market sentiment, leaving investors cautious about the remainder of the year.

The Iran war's inflationary impact on oil and food prices is the core driver behind this market shift. Central banks globally, including the Bank of Canada, face a delicate balancing act: easing monetary policy risks fueling inflation further, while maintaining high rates could stifle economic recovery. Gold producers' shares led the sell-off as investors priced in lower gold demand if inflation persists, reducing the metal's appeal as a hedge. This development signals a potential headwind for resource stocks and highlights how commodity markets remain sensitive to geopolitical tensions.

The TSX's loss of all annual gains marks a significant psychological turning point for investors. With gold prices down sharply and central bank policy now in question, the index faces headwinds from both commodity weakness and uncertain monetary policy. This development suggests a more cautious approach to risk assets for the rest of 2026, as inflation risks from the Iran conflict could delay rate cuts longer than markets previously expected.