I have always kept it simple and had my 401k payroll contribution allocated directly to the funds I selected in Vanguard. I believe its called dollar cost averaging, didn't matter whether the market was up or down it automatically went into the funds I had selected. Is this how the majority of the folks on this forum do it? I have been wondering if it makes sense to have all the new contributions deposited in say a MM fund then in market pullbacks allocate the money to the different funds? Thanks.