Long owns and hopes for up. Short borrows, sells and hopes for down — with no ceiling on the loss.
Two ways to take a view on a price
A long position is the ordinary one. You pay for shares, you own them, and you want the price to rise. The most you can lose is what you paid, because a share cannot trade below zero. The most you can gain has no fixed limit, because nothing caps how high a price can go.
Keep reading: 4 more paragraphs (about 1 min)
A short sale reverses the order of events. You borrow shares through your firm, sell them today, and later buy the same number back to return to the lender. You want the price to fall, because you profit by buying back cheaper than you sold. That is why a short seller is bearish.
The arithmetic is mirrored, and so is the risk. The best case for a short is the stock going to zero, so the gain is capped at the sale proceeds. The worst case is the price rising without limit, so the loss is uncapped.
On the exam, first decide who owns what. A seller who owns the shares is closing a long. A seller who borrowed them is opening a short. Get that right and direction, outlook and maximum loss follow.
The regulation defines a short sale by what the seller does not have: any sale of a security which the seller does not own, or any sale consummated by the delivery of a security borrowed by or for the account of the seller. Ownership for this purpose is wider than holding the certificate — a person owns the security if they hold title to it, have bought it or entered an unconditional contract to buy it, have tendered a convertible security for conversion, or have exercised an option, warrant or subscription right to acquire it. And it is narrower in one direction that catches people out: a person is deemed to own securities only to the extent of a net long position, so someone who is long 500 and short 300 owns 200 for this test.
Exam terms (6)
- Long position
- Owning a security; profits if the price rises.
- Short position
- Having sold borrowed securities; profits if the price falls.
- Bullish
- Expecting a price to rise.
- Bearish
- Expecting a price to fall.
- Buy to cover
- The purchase that closes a short by returning the borrowed shares.
- Unlimited risk
- A loss with no upper bound because the price can keep rising; the mark of an uncovered short.
Long against short
| Long | Short | |
|---|---|---|
| Opened by | Buying shares | Selling borrowed shares |
| Outlook | Bullish | Bearish |
| Profits when | Price rises | Price falls |
| Maximum gain | Unlimited | Sale proceeds (stock to zero) |
| Maximum loss | Amount paid | Unlimited |
| Closed by | Selling the shares | Buying to cover |
Try it: Take a stock at $30. On paper, write the profit or loss for a 100-share long and a 100-share short at prices of $0, $15, $30, $45 and $90. Circle the one figure that has no bottom.
Check yourself
Try a question, then read the explanation to review the rule.
Opening your study record…
Worked example
An investor sells short 200 shares at $45, borrowing them through her firm. Two months later the stock is $38 and she buys 200 shares to cover.
- She received 200 × $45 = $9,000 when she sold the borrowed shares.
- She paid 200 × $38 = $7,600 to buy them back and return them to the lender.
- Her gain is $9,000 − $7,600 = $1,400, ignoring costs.
- Had the stock risen to $60 instead, covering would have cost $12,000 and the loss would have been $3,000; at $100 it would have been $11,000. Nothing stops that number growing.
Same rule, new context
Opening your study record…
The closest contrast
Long: loss stops at zero.
Short: loss never stops.
This decides any question that pairs a market view with a tolerance for loss. A bearish investor who cannot accept an open-ended loss is not a candidate for a short sale, however confident the forecast.
Summary
- Long means you own it and want it up; short means you borrowed and sold it and want it down.
- A long can lose no more than it cost; a short can lose without limit.
- A short seller’s best case is the stock at zero, so the gain is capped at the proceeds.
- A short is closed by buying to cover, and the loss is set by the price at that moment.
Related practice
- Long vs short positions and capacityPractice this
Sources
- SIE Examination Content Outline (2025) · FINRA · checked 2026-10-12
- 17 CFR 242.200 — Regulation SHO, definition of a short sale and of ownership · SEC · checked 2026-09-04
- Options (FINRA investor education) · FINRA · checked 2026-09-04
- Investor Bulletin: An Introduction to Short Sales (October 29, 2015) · Investor.gov · checked 2026-09-04