NEW YORK (AP) — A stronger dollar and more discouraging signs of a subdued economic recovery are driving a broad sell-off in stocks.

Energy and material stocks are showing the biggest losses as a jump in the dollar sends commodity prices tumbling. A stronger dollar makes commodities more expensive to foreign buyers, and companies that produce the commodities make less money from them.

Meanwhile, an analyst’s downgrade of the chip sector is pulling technology shares sharply lower.