The Dow and the S&P 500 had their worst week ever. Is this the bottom? What does the future hold? What should investors do now? In this installment of "Fool Video," Motley Fool co-founder David Gardner gives his take. (Note: The video was taped Friday afternoon, before the market’s late-day rally.)

David Gardner is co-founder of The Motley Fool, co-advisor of Stock Advisor, and advisor of Rule Breakers. The Motley Fool has a disclosure policy.