SPX 976 (20% off 1220, an official bear market start, more selling come when it hits and rebounds quickly) 和 945 (0.5*(1220 - 666) +666). 1042 是 (1220-666)*0.68+ 666;1131 是 (1220-1042)*0.5+1042.第一条被hit, 可能就在今夏