The market has gone parabolic because of the combination of wave (v) being extended and at the same time is also an expanding diagonal. So the market had some "room" to behave unpredictably. That will not last of course . A good level to end this impulse is at 299.72 where 5=(1~3)*.618 and is also close to minor wave 1*1.618=3 at 300.98.