3 Helpful Rules for Investors as the Dow Goes Up

The Dow is climbing, and with it, investors' hopes and dreams.The Dow Jones industrial average shot past the 25,000 mark for the first time in January -- and just a week later, topped a new milestone of 26,000.Because while you may think you know everything you need to know about the stock market (and maybe you do!), this is not your parents' or grandparents' Dow.