Try to imagine that this is the stock market: http://upload.wikimedia.org/wikipedia/commons/b/b7/Population_curve.svg http://upload.wikimedia.org/wikipedia/comm

Try to imagine that this is the stock market: http://upload.wikimedia.org/wikipedia/commons/b/b7/Population_curve.svg http://upload.wikimedia.org/wikipedia/commons/b/b7/Populatio...