better known as the “$1,000-a-month-rule,” a back-of-the-envelope guesstimate that tells you the amount you must save in your 401(k), IRA, or 403(b) to generate a thousand bucks of monthly income.

It's not easy to turn $1,000 into a million bucks (or more), but these four retailers have done it. They each have enjoyed decades of growth, fueled by U.S. consumer spending, the most significant ...