Stock futures pared losses and shifted to mixed ground ahead of Tuesday’s open. Dow futures clawed 1.5 points above fair market value. S&P 500 futures were down 1.3 points. Nasdaq 100 futures pared some losses, but remained down 9.5 points. The stock market today opens with the Nasdaq testing support at its 50-day moving average and the S&P 500 sliding, below its 50-day, eyeing a possible test of its 200-day moving average.