Shares of homebuilders got a lift on a pair of upbeat housing reports, amid gathering strength in the sector. Leading companies in the building group, including Ryland (RYL), Lennar (LEN), MI Homes (MHO), Standard Pacific (SPF) and KB Home (KBH) rose in Tuesday afternoon trading. S&P Case-Shiller's adjusted monthly index of home sales rose 0.4% in September. It was the third straight month of relatively strong growth as low interest rates, along