Final answer:
To protect gains on a stock that has risen in value, a stop-loss order can be placed with a broker, which automatically sells the stock if it falls to a predetermined price, thus securing a part of the profit.
Step-by-step explanation:
If you purchased XYZ stock at $50 per share and the stock is currently selling at $65 per share, your gains could be protected by placing a stop-loss order. A stop-loss order is an order placed with a broker to buy or sell once the stock reaches a certain price.
It is designed to limit an investor's loss on a security position. Setting a stop-loss order at, for example, $60, would protect your gain since the stock would be sold if it falls to this price, thus locking in a portion of the profit from your initial investment.