TORONTO -- Canada's main stock index saw all of this year's gains wiped away with a fourth day of triple-digit declines over concerns about the impact of the novel coronavirus outbreak.

The S&P/TSX composite index was closed down 135.45 points at 17,041.92.

In New York, the Dow Jones industrial average was down 123.77 points at 26,957.59. The S&P 500 index was down 11.82 points at 3,116.39, while the Nasdaq composite was up 15.16 points at 8,980.77.

The Canadian dollar traded for 75.15 cents US compared with an average of 75.30 cents US on Tuesday.

The April crude contract was down US$1.17 at US$48.73 per barrel and the April natural gas contract was down 1.4 cents at US$1.84 per mmBTU.

The April gold contract was down US$6.90 at US$1,643.10 an ounce and the May copper contract was down 0.85 of a cent at US$2.57 a pound.