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Assessment: Volume will likely start to drop off today and we will eventually get to the point where we just go sideways. With SPY $450 being key resistance it would not shock me that we park price right here. Not to mention, it would be good for the market makers for SPY to park right at $450 so that the largest number of options expire worthless.
Next week should provide more volume and clear hints for the direction this fall. Although, I could also see the bears triggering a bull trap with an initial pop above $450, suck in some bulls and then they slam the door on them and dump a ton of shares into the pop. Just have to see the initial action and should be some good tea leaves to read. Until then, not a whole lot to do.
Good luck in your trades!