Short Selling Explained: Risks of Betting on a Fall
Going short lets you profit when a price falls. It also flips the usual risk on its head: a long position can only fall to zero, but a short can lose far more than you put in.
Most people start trading by buying — betting a price will rise. Shorting is the mirror image: a bet that a price will fall. It's a legitimate and widely used tool, but for a beginner it carries a specific, under-appreciated danger that buying does not, and it's worth understanding clearly before going anywhere near it.
Risk warning. Short positions, especially through leveraged products like CFDs and spread bets, can lose money rapidly and the loss can exceed your initial stake. Most retail accounts lose money trading leveraged products. [VERIFY + DATE: insert the current FCA/ASIC-published share of retail accounts that lose money.]
Where this sits in the trade
Shorting is a direction of trade rather than a separate stage of the lifecycle in the mechanics. It is most often done through the leveraged products and therefore inherits the leverage risks, with an extra twist of its own.
How shorting works
To go short the traditional way, you borrow an asset (typically shares), sell it at today's price, and aim to buy it back later at a lower price — returning the borrowed asset and keeping the difference. You profit if the price falls and lose if it rises. In practice most retail traders never touch the borrowing mechanics: they go short through a CFD or spread bet, simply by opening a "sell" position, which achieves the same exposure without literally borrowing stock.
Either way, the economics are the same — and so is the asymmetry that makes shorting dangerous.
The asymmetry that makes shorting dangerous
When you buy (go long), the most you can lose is everything you put in: a price can fall to zero but no further, so your downside is capped at 100%. When you short, the logic inverts. A price has no ceiling — it can double, triple, or more — and your loss grows with it. A short position's losses are theoretically unlimited, because there is no limit to how high a price can climb. Add leverage, and a rising market can generate losses that exceed your entire deposit with frightening speed (retail negative-balance protection limits this to your account balance in the UK and Australia, but that can still mean losing everything you deposited).
The risk: the open-ended downside is not a technicality. Shorting asks you to be right about direction and timing while facing a loss that has no natural cap — the opposite of the bounded risk most beginners assume they're taking.
Short squeezes and other hazards
A short squeeze is the nightmare scenario: a heavily shorted asset starts rising, forcing shorts to buy back to limit losses, and that buying pushes the price up further, forcing yet more shorts to cover — a self-reinforcing spike. Several high-profile squeezes have inflicted enormous losses on short sellers in days. Shorting also carries borrowing costs (you pay to borrow the asset, or financing on the position), the risk of being forced to close early, and the possibility that regulators impose temporary short-selling bans during periods of market stress, as has happened in past crises.
The jurisdiction lens
Shorting is permitted in both the UK and Australia, but it sits inside the same retail CFD restrictions from the Financial Conduct Authority (FCA) and the Australian Securities and Investments Commission (ASIC), and both regulators have the power to restrict short selling in stressed conditions. Australian retail traders short via CFDs (not spread betting, which isn't offered there); UK traders can use either. The protections — and the rules on disclosing large short positions — differ by jurisdiction, so check what applies where you trade.
The case for and against shorting
For. Shorting serves real purposes: it lets investors hedge existing holdings, express a view that an asset is overvalued, and it contributes to market price discovery by letting negative information into prices. In a falling market, the ability to go short is the only way to profit from the move.
Against. For a beginner, shorting combines the open-ended, theoretically unlimited downside with the speed of leverage and the psychological pressure of a position that gets worse as the market rises. Short squeezes can be violent, borrowing costs erode returns, and being right about a bubble but wrong about timing can still ruin you. The asymmetry is genuinely unforgiving.
No verdict — but shorting is a tool whose risk profile is the inverse of, and harder than, the buying most beginners start with.
FAQ
What is short selling? Betting that a price will fall — by borrowing and selling an asset to buy back cheaper, or, more commonly for retail traders, by opening a "sell" CFD or spread bet. You profit if the price drops and lose if it rises.
Can you lose more than you invest by shorting? The loss is theoretically unlimited because a price has no upper ceiling. Retail negative-balance protection in the UK and Australia caps your loss at your account balance, but that can still be your whole deposit.
What is a short squeeze? A sharp rise in a heavily shorted asset that forces short sellers to buy back, pushing the price up further and forcing more buying — a self-reinforcing spike that can inflict huge losses fast.
Is shorting allowed in the UK and Australia? Yes, generally through CFDs (and spread bets in the UK), under FCA and ASIC rules — though both regulators can restrict short selling during market stress.
What it connects to
Every product and position discussed so far runs through one thing: the platform you trade on, and whether it's genuinely regulated. Continue to The Platform: what a broker really is, and how to spot an offshore trap (Piece 7), or revisit the products that let you short.
This article is general information only and is not financial advice or a recommendation to trade or to use any product or platform. [Publication] is not a licensed financial adviser. Trading and investing carry risk, including loss of capital; leveraged products such as CFDs and spread bets can lose money rapidly, and most retail accounts lose money. Figures are accurate as of June 2026 and will change. Rules, taxes, products and protections differ by country — do your own research and consider a locally regulated professional.
Sources: FCA and ASIC (short-selling rules and crisis restrictions), exchange short-interest disclosures, historical short-squeeze case studies. Top-level resources; verify current short-selling rules at publish.