May 14 (Reuters) - Canada's main stock index opened

slightly up on Tuesday, supported by a rise in material and

healthcare stocks, while investors assessed

stronger-than-expected producer prices data from the U.S. that

dampened hopes of interest rate cuts this year.

At 9:31 a.m. ET (13:31 GMT), the Toronto Stock Exchange's

S&P/TSX composite index was up 30.97 points, or 0.14%,

at 22,290.14.