Attention-Deficit Disorder

On Thursday, investors received a decidedly unwelcome reminder that stocks can (and will) occasionally fall, recent developments notwithstanding. There for a while, it was beginning to seem as though the very concept of a "selloff" had been relegated to the theoretical realm -- an event that, while theoretically possible, isn't something anyone is likely to actually experience. Kind of like winning the lottery. Which is ironic, because part of what created the parabolic surge in tech shares ove