Lumber prices notch their ninth consecutive weekly loss after a brief resurgence earlier in the week.  The price of the key building material has slid about 60% from its peak in early May.  A shift in spending away from DIY home projects is impacting the market, says Bank of America.  Prices for lumber suffered another weekly loss and descended to levels not seen in roughly six months as the market contends with signs of softening demand and easing shortages.  Lumber prices on Friday fell about 4% to trade at $689 per thousand ...