Short selling means selling a security you have borrowed — hoping to buy it back cheaper later and pocket the price difference. It is the only way to profit from a falling price without using derivatives. Short selling is a legitimate trading strategy but carries theoretically unlimited loss risk — the price can rise without limit.

What is short selling? — shorting explained

Short selling is used by hedge funds, activist investors, and speculators. It is also a common tool for hedging a long position in a related asset. Understanding how short selling works is important for anyone actively trading financial markets — whether you short yourself or not, because other participants' short positions can affect price movements.

How does short selling work?

The process happens in four steps:

1. Borrow shares: you borrow shares from an existing shareholder (via your broker) for a lending fee
2. Sell: you sell the borrowed shares on the market at the current price
3. Wait: you wait for the price to fall
4. Cover the position: you buy back the shares (at a lower price) and return them to the lender — your profit is the difference minus the lending fee and commissions

Concrete example

You short 100 shares of Company X at $100 each = $10,000 received. The price falls to $70. You buy back 100 shares for $7,000. Gross profit: $3,000 (minus lending fee and commissions).

If the price instead rises to $150 and you are forced to close: you buy 100 shares for $15,000 — a loss of $5,000. There is in theory no upper limit to how high a price can rise, making the loss potentially unlimited.

How to short in practice

Via CFDs

The most common method for retail investors is to short via CFDs (Contracts for Difference). You open a "sell position" on a CFD platform — you never own the underlying shares, you trade the price difference. Simple to execute but involves leverage and counterparty risk against the CFD provider. Warning: CFD trading involves high risk. The majority of retail CFD traders lose money.

Via traditional short selling through a broker

Some brokers (e.g. Interactive Brokers) offer traditional short selling through stock lending. Requires a margin account with sufficient capital as collateral. Suitable for more experienced traders. For information about trading accounts, see aktie.se.

Via inverse ETFs

Inverse ETFs ("short ETFs") move in the opposite direction to their underlying index. If the S&P 500 falls 2%, a -1x inverse ETF rises approximately 2%. Easy to buy like regular ETFs — but not suitable for long-term holding due to daily rebalancing that creates a negative compounding ("decay") effect. Read more about how ETFs work at What is an ETF?

Correct timing is critical in short selling. Learn to identify entry signals, trends, and reversals with our guide on technical analysis — covering RSI, MACD, and support/resistance levels used by experienced short sellers.

Why do investors short?

Speculation on a decline

The classic reason: you believe a company is overvalued, has accounting irregularities, or is in structural decline. Famous short sellers like Jim Chanos and Hindenburg Research specialise in identifying such companies. Identifying overvaluation relies on fundamental analysis — ratios like P/E and EV/EBITDA compared against sector averages and history.

Hedging

If you hold a large equity position you can short a related index or sector ETF to reduce your market exposure without selling your core holding. For example: you own shares in a mining company but are worried about global economic slowdown — you short an industrial index to partially offset a downturn.

Short selling as a hedge is one of several ways to protect a portfolio — see our guide on inflation hedging for a broader overview of protective strategies. How short selling fits into a well-balanced portfolio is explained in the guide on portfolio diversification.

Market-neutral strategy

Hedge funds often pair long and short positions (long-short strategy): buying a stock they expect to outperform and shorting a related stock they expect to underperform. The goal is to profit from relative performance regardless of whether the overall market rises or falls.

Risks of short selling

• Unlimited loss: a stock can rise without limit — your loss is theoretically unlimited
• Short squeeze: if the price rises sharply, short sellers are forced to close their positions by buying — which drives the price even higher, forcing more short sellers to cover (a "squeeze"). GameStop in 2021 is the most famous example
• Margin calls: if the price rises your broker demands more margin collateral — if you cannot cover, the position is closed at a loss
• Stock lending cost: heavily shorted stocks can carry high borrowing costs (sometimes 10–50% annualised)
• Timing: a company can be fundamentally overvalued for a long time — "the market can remain irrational longer than you can remain solvent" (Keynes)

Regulation of short selling

Short selling is regulated in the EU under the Short Selling Regulation (EU) No 236/2012. During extreme market conditions, national regulators can temporarily ban short selling in individual stocks or sectors — as happened during the 2008 financial crisis and at the start of the Covid-19 pandemic in 2020.

Frequently asked questions about short selling

Is short selling ethically defensible?

It is a contested question. Defenders argue that short sellers perform an important function: they expose accounting fraud (e.g. Enron, Wirecard) and keep markets more efficient. Critics argue that aggressive short campaigns can cause unnecessary panic and liquidity pressure on companies in temporary difficulty. EU regulations aim to balance these interests.

Can you short cryptocurrencies?

Yes — via crypto CFDs and futures on platforms like Binance, BitMEX, and Kraken. The crypto market is extremely volatile, making short selling even more risky. Short squeezes are common in crypto due to high leverage among speculators. Check live prices at bitcoinpris.se.

What is the difference between short selling and selling your position?

Selling shares you own means the maximum loss is what you invested (if the price goes to zero). Short selling means selling shares you borrowed — your loss if the price rises is theoretically unlimited. That is a fundamental risk difference that makes short selling appropriate only for experienced traders with clear risk management.

Where do I find short interest data?

Regulatory authorities publish short-selling registers for listed shares, where positions above a reporting threshold must be disclosed. Short interest (the percentage of the float that is shorted) is an indicator of market sentiment toward a company — high short interest can signal expected decline, but is also a potential short-squeeze indicator if the news flow turns.