Markets & Economy Why would someone lock up money by rolling it into a 401(k)? August 29, 2026 · 1:00 pm 1 sources ad slot · in-content video 16:9 Coverage CoverageWhy would someone lock up money by rolling it into a 401(k)?MarketWatch · August 29, 2026 13:00When done right, rollovers can be a great tool.