Its shares fell 4.6 percent , or $ 4.04 , to $ 83.38 and was the blue-chip Dow 's biggest percent loser .
Martha Stewart shares fell $ 2.03 , about 18 percent , to $ 9.17 and were the NYSE 's biggest percentage loser .
a series of computations representing an object that moves away from its initial position by taking a random direction at every step.