Lumber futures are coming under pressure as the housing market gets more restrictive for new buyers.  Lumber prices remain subdued below critical support at $1,000 per thousand board feet.  Mortgage rates surged above the 5% level on Tuesday for the first time in years.  Lumber futures are struggling to reclaim a crucial support level as the housing market gets more restrictive for first time home buyers thanks to surging mortgage rates.  Lumber prices per thousand board feet fell 1.5% on Tuesday, remaining subdued below their crucial $1,000 per thousand ...