Short selling is a way to profit when a price falls. You borrow shares, sell them now, and aim to buy them back later at a lower price, pocketing the difference. If the price rises instead, you lose money, and because a price can climb indefinitely, short losses are theoretically unlimited, which makes it riskier than buying.
You short 50 shares of a $100 stock, receiving $5,000. It falls to $80, so you buy back 50 shares for $4,000 and return them, a $1,000 profit. But if the stock had risen to $120, buying back would cost $6,000, a $1,000 loss. On JagSim you can practice going short on names like GME with virtual money.
Short-selling is how traders try to profit when a price falls instead of rises. Understanding it matters even if you never do it, because it explains a lot of market behavior, like sharp squeezes higher when shorts rush to buy back. The risk profile is also famously lopsided, since a stock you buy can only go to zero but one you short can keep climbing. Practicing shorts on a paper-trading simulator is a low-stakes way to feel that asymmetry before it ever touches real money. JagSim gives no buy or sell recommendations, price targets, or investment advice.
Assuming losses are capped. When you buy a stock the most you can lose is what you put in. A short works the other way, since a rising price has no ceiling, so the potential loss is open-ended.
Forgetting the borrow costs and dividends. Shorting means borrowing shares, which can carry a fee, and the short seller is on the hook for any dividends paid while the position is open. These costs quietly eat into results.
Underestimating a short squeeze. When a heavily shorted stock jumps, shorts scrambling to buy back can push it even higher, fast. Beginners often get caught off guard by how violent that kind of move can be.
A trader borrows shares and sells them, hoping to buy them back later at a lower price and return them. The difference between the sell and buy prices is the gain or loss, minus any borrowing costs.
A stock you own can only fall to zero, so the loss is limited. A short position loses money as the price rises, and since price has no upper limit, the loss can in theory keep growing.
Yes. A paper-trading simulator lets you open short positions with virtual money, so you can see how they behave when a price rises or falls without any real capital at stake.
Last updated: July 2026
Educational only. Not investment advice. JagSim is a simulator, not a broker.