Buying and selling stocks in the stock exchange in anticipation of changes in the share price is?

The correct answer is speculation. Speculation is the practice of buying and selling assets, such as stocks, in the hope of making a profit by anticipating the future movements of prices. In the context of the stock exchange, speculation involves taking on risk in the expectation of a reward. Speculators buy stocks when they believe the price will rise, and sell when they believe it will fall. It is important to note that speculation carries a higher degree of risk than other forms of investment, as it is based on uncertain predictions and can result in significant losses.