Friday’s are correctly referred to as Freaky Friday in Disney movies, although they are referring to an inter-body experience. In this case, watching business markets on a Friday can be about the same. It’s funny how it can go one way, then another, then another, and simply not do what’s expected. Although Friday is freaky it is also a good day to set up Monday which is usually not nearly as freaky.
I usually avoid business decisions on Friday and focus more on weekend decisions like which brand of golf ball to use or which amusement park to take the family too. Every now and then a decision on which angle to cast a fly is appropriate as well.