North American lumber prices have fallen 22% from their early March peak as the housing market shows signs of cooling.  New home sales fell for a second straight month in February, dropping 2% to a seasonally adjusted annual rate of 772,000 units.  North American lumber prices are bucking the trend of other supply-constrained commodities and moving lower in March as the housing market shows signs of cooling down.  Lumber futures have dropped 22% from their early March high of $1,357 per thousand board feet to $1,054 last Wednesday. The ...