Answer:
C. momentum effect
Explanation:
it is the tendency of both poorly and we'll performing stock to continue the same trend. It is due to the momentum investors who have the tendency to chase performers. Thus if a stock is performing well, these investors invest more in such stocks and increase the price of the stock further thus keeping the same trend. And if a stock is doing bad, these investors sell this stock decreasing the price of the stock further. Thus they remain as poor performers next period as well