@ljberkow The stock market has already discounted the future cash flows from the tax cut at least to some extent. To To say that stock prices will continue to increase in value forever fails to consider that markets already discount future cash flows to present value, especially those that are easily forecast such as savings from tax cuts.
The point of the article I posted about how “student” is defined is that the tax code seems to define “student” to include both part time students and full time students equally. Part time students are seasonal (think executive program MBA students or students who take summer classes at Emory but are otherwise students at other universities). Therefore, setting different cut off dates for the time frame over which “students” are counted will affect the headcount.