TORONTO - North American stock markets fell for a second straight trading day following Britain's surprising vote to leave the European Union.

The S&P/TSX composite index in Toronto lost 202.09 points at 13,689.79, dragged down by metals, energy and bank stocks.

The Canadian dollar lost 0.44 of a U.S. cent to 76.49 cents US after plunging 1.37 U.S. cents on Friday as the greenback, seen as a safe haven in times of turmoil, strengthened against most major currencies.

Britain sent stock markets plummeting after voting to leave the EU on Thursday.

In New York, the Dow Jones industrials tumbled 260.51 points at 17,140.24 after a whopping 610-point drop Friday, while the broadly based S&P 500 dropped 36.87 points at 2,000.54.

The tech-heavy Nasdaq was down 113.54 points to 4,594.44.

In commodities, the August contract for benchmark North American crude oil was down $1.31 at US$46.33 a barrel, while August natural gas rose five cents to US$2.74 per mmBtu and July copper added a penny to US$2.12 a pound.

The August contract for gold rose $2.30 to US$1,324.70 a troy ounce after soaring $59.30 on Friday.