> Reallocate portfolios if that makes sense Yes. This is one of the reasons 80 stocks / 20 bonds is a common strategy. The rebalancing "forces" you to buy low

> Reallocate portfolios if that makes sense Yes. This is one of the reasons 80 stocks / 20 bonds is a common strategy. The rebalancing "forces" you to buy low and sell high. When stocks dip, your portfolio might become unbalanced at 70/30, so you reallocate funds to buy stock bringing you back to 80/20. Conversely, if stock market soars, you might get to 90/10, and selling stocks would bring you back to 80/20. Performing this balancing is, in effect, "buying the dip"