Every time someone sells a stock believing that the price of that security will soon decrease, someone else:
a. is buying that stock believing that the price will increase
b. is buying that stock believing that the price will decrease.
c. is buying that stock in order to increase the price.
d. is buying that stock in order to decrease the price.
Stock exchange is a zero-gain game, when someone gains, someone ...
The expert determines what happens to a stock when the seller believes that the price of the security will soon decrease.