The Globe and Mail reports in its Tuesday edition that the S&P 500 and Nasdaq closed down Monday, dragged by declines in the megacap technology stocks including Alphabet, while investors assessed developments in U.S.-Iran negotiations. A Reuters dispatch to The Globe says the Dow closed higher, boosted by the health care and industrial sectors. Canada's main stock index also rose, led by mining shares. SpaceX tumbled 16.4 per cent, its biggest single-day drop, and weighed heavily on the Nasdaq composite. Analysts noted that more investors have been questioning lofty spending on infrastructure expansion by hyperscalers. Alphabet fell 5 per cent while Meta, Amazon and Microsoft fell between 2.3 per cent and 4.7 per cent. "This is a very sentiment-driven sector and the group tends to trade together on a day-to-day basis," said Bill Northey at US Bank. "But as we step back, some of the strongest fundamentals are within the AI data-centre buildout space. That includes both the hyperscalers as well as many of the components that go into that continued buildout." The S&P/TSX composite ended up 144.84 points at 35,002.18 after three straight days of declines. The materials group rose 1.4 per cent as gold rebounded.