Lumber futures fell below $550 per thousand board feet, reaching their lowest level in nine months, as elevated borrowing costs continued to weigh on demand. The US housing market remains tight, with mortgage rates near their highest level in over a year and showing no sign of easing after the Federal Reserve hiked its key policy rate, weighing on demand from prospective homebuyers. Building permits also fell 2.7% over the month, although a 7.6% increase in lumber-intensive single-family housing starts in August. Provided an offsetting pressure, US-Canada trade talks fell through, raising concerns over lumber supply.