Longer-dated U.S. Treasury yields rebounded and Wall Street futures were mixed in early trading Monday, with some investors apparently poised for more Omicron dip-buying after uncertainty over the new variant last week sparked sharp selloffs in risk assets and fueled interest in havens like government securities. A slightly more upbeat mood was evident early Monday, with 10-year U.S. Treasury yields clawing back some of Friday’s drops that took them below 1.4 percent for the first time since late September. Yields move in the opposite direction to prices. By 5:12 a.m. New York time, the yield on the 10-year had risen to 1.394 percent, after plumbing a low of 1.341 percent on Friday following the Labor Department’s release of a lackluster jobs report. At the same time, the yield on the 30-year Treasury bond climbed to 1.719 percent, after Friday’s fall to around 1.675 percent. Wall Street generally appeared poised for …