The roller coaster ride for US lumber prices is still going strong. In the past month, the price of lumber futures has soared nearly 40 percent to $672.50 per thousand board feet, near a pre-pandemic high.  The present cost is also seeing gains, as Random Lengths reports a 27 percent increase in an index that tracks immediate sales.  Lumber futures are a tick above where they were a year ago, but well above the average from 2015 to 2019, when they hovered right below $400 per thousand board feet.  As ...