By Marcy Nicholson
Bloomberg
Lumber futures posted their biggest-ever weekly loss, extending a tumble from all-time highs reached last month as sawmills ramp up output and buyers hold off on purchases.
Prices in Chicago fell 18% this week, the biggest decline for most-active futures in records going back to 1986. Lumber has has now dropped almost 40% from the record high reached on May 10.