Very simple thread. a 100 point spread top to bottom essentially no change 200 point spread normal year. 300 point spread high normal 400 points scary news. 500 points scary thing happens a massive bailout. 600 point very scary thing happens a state or foreign national default. 700 point OMG 800 point off the charts. 900 a very transforming event good or bad Sure for cancer or major war. 1000 either cheap cold fusion or a close encounter with all out nuclear war. Which do you pick as likely?