The first is during the peculiar annual ritual of end-of-the-year tax selling. It’s no accident that the most severe drops have occurred between October and December. It’s the holiday period, after all, and brokers need spending money like the rest of us, so there’s extra incentive for them to call and ask what you might want to sell to get the tax loss. For some reason investors are delighted to get the tax loss, as if it’s a wonderful opportunity or a gift of some kind—I can’t think of another situation in which failure makes people so happy.