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The dow falling by more than 2%. whats behind the tumble? should investors be concerned about whats ahead? joining uggjoining us now, fox r business correspondent brenda butner, anchor of bulls and bears. brenda, youre accommodating by background us on this topic. i thought a lot of people would be worried. i am. are you? >> reporter: yeah. well, absolutely. the dow is down some 4% from when it hit its record close on august 2nd. its been very -- the market has been very volatile this month, so ...