Problem: In one's ability to select stocks may cause some to lose significant sums of money. Further, once losses in the stock market occur, traders are often reluctant to accept the loss by selling, and instead hold onto stocks as they potentially fall further in price, an example of _____. Lack of confidence; framing bias Overconfidence; the sunk cost fallacy Overconfidence; framing bias Lack of confidence; the sunk cost fallacy. Need Assignment Help?