Toronto Stock Exchange's S&P/TSX composite index was up 34.49 points, or 0.17%, at 19,886.67. The benchmark was on course to end May with a near 4% gain.
Dundee Precious Metals fell 4.4%, the most on the TSX, after it agreed to buy INV Metals Inc, which soared 51%. The second biggest decliner was Cronos Group Inc , down 3.8%.
The blue-chip FTSE 100 index was falt with banks and life insurers adding 0.6pc and 0.1pc, respectively. HSBC Holdings and Prudential provided the biggest boost.