I handle our family's finances and I've been rolling along with a fairly lazy passive investment portfolio for a while, rebalancing every month with excess cash and it had worked out pretty well.
Then I got pregnant and had a baby, and our finances have been neglected for a while. Now I have a large lump of cash that has built up (~$40k) that I need to move into investments, but I'm not sure if it's better to do it all at once or if I should invest a set amount each month over the course of several months until I completely draw-down the excess cash.
Intuitively, I feel that doing it over the course of several months spreads out risk, but I know that a lot of things about investing doesn't match our intuition.