What is the most likely reason for an increase in the price of a specific stock

The most likely reason for an increase in price of a specific stock would be that the specific stock of whatever it maybe is either because it is:

· selling quickly. (which in terms brings the prices and the demand for it to be higher)

or 

· it could be very deficient which means that the material has decreased and become more valuable and higher of price because of it's rarity.

He was probably very upset and disapointed and mad. all at once. so he probably wanted to show his disapointment, angryness, and depression. he didn't think of the affects due to the minor issue thst he has gone through. sorry if it doesn't . but i am trynna people.