The major indexes continued to trade slightly higher ahead of Tuesday's opening bell, as the Street took in economic reports. S&P 500, Dow and Nasdaq 100 futures all edged up in pre-market action. The Commerce Department said construction of new homes and apartments fell 5.9% in February to a seasonally adjusted annual rate of 575,000 units. Inclement weather in the Northeast and Midwest contributed to the drop. The decline was bigger than