LDBD Dev Log #8 — Catching the "QQQ Returns 20% a Year" Illusion in My Investment Goal Calculator

A free dollar-cost-averaging goal calculator: how much your monthly contributions grow over the years, and in reverse, how much per month a savings goal actually requires. This post covers why the default expected returns use each asset’s full listed history instead of the recent decade, how taxes are approximated, and the return illusion caught along the way.