It seems to me that it was a calculated prediction. WS turned from a full on bull to a bear after delays became the norm. Predicting .65 was based on riding the delays into a private raise at .75 and thinking with no news it's going to erode. WS also knows that the SP can rise rapidly with positive news relating to completion time line associated with the Adjunct PIII. This is why he is saying .50 or 1.50. It's all a calculated opinion based on forecasting the time line. Nothing more nothing less. None of it matters unless your flipping. Sooner or later the calculated prediction is wrong. IMO of course.
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