A KGHM Polska Miedz SA Copper Smelting Factory

A KGHM Polska Miedz SA Copper Smelting Factory

Bartek Sadowski/Bloomberg

Poland’s KGHM Polska Miedz SA agreed this week to buy Quadra for C$2.28 billion ($2.26 billion) including net cash, valuing the Canadian miner at 5.2 times net income, the lowest for a copper takeover of similar size, according to data compiled by Bloomberg.