North American lumber, which at one point was among the world’s best-performing commodities as the pandemic sent construction demand soaring and stoked fears of inflation, has officially wiped out all of its staggering gains for the year.  Prices at last Monday’s close are now down 0.6% for the year as demand eases and supply expands in response to earlier gains. The rally turned a common building product into a social media sensation and a flash point in the debate over U.S. monetary policy. At one point, lumber futures were trading as high as ...