What it means
To understand this practice, it helps to look at how standard short selling works. Normally, if an investor thinks a company's share price will drop, they borrow shares from a broker, sell them immediately, and plan to buy them back later at a lower price to return to the lender.
In contrast, naked short selling skips the borrowing step entirely. The seller simply records the sale without securing the shares first.
In most modern financial markets, trades must settle within a specific timeframe, usually two business days. When the seller fails to deliver the actual shares by the settlement date, it creates what is known as a failing trade or a fail to deliver.
While electronic trading systems sometimes allow brief delays due to processing quirks, intentional and widespread naked shorting creates artificial supply. Why does this matter?
Supply and demand dictate market prices. If someone introduces millions of phantom shares into the system without backing, it artificially inflates the available supply.
This excess pressure can unfairly drive down a company's share price, harming the business, its founders, and legitimate shareholders. Because of this distortion, strict regulations exist to curb the practice.
Regulators often require brokers to locate shares before a short sale can take place. If a persistent failure to deliver occurs, the stock is placed on a restriction list, forcing market participants to buy actual shares in the open market to clear the backlog.
For non-finance managers, recognising this concept highlights why market integrity and strict settlement rules are vital for fair business valuations.
In practice
Real-world examples.
Example
Techstart, a growing software firm, saw its share price drop sharply when aggressive traders sold millions of shares they never borrowed. This artificial selling pressure made it hard to raise expansion capital.
Example
GreenBrew, a regional beverage SME, prepared for a public share offering. Unauthorised naked shorting flooded the market with phantom shares, causing sudden price volatility that confused retail investors.
Example
MedInnovate, a medical device manufacturer, suffered a sudden stock crash. Investigations revealed heavy naked short selling, which created settlement failures and damaged the firm's credit standing with suppliers.
Think of it
“Imagine selling a car you do not own and have not even tried to buy from a neighbour, promising to hand over the keys next week. If you cannot find that car in time, the buyer is left holding a phantom promise.
Case study
Seen in the real world.
Consider a fictional manufacturing business named Apex Industrial Supplies, listed on a public exchange. Apex had stable revenues of 50 million pounds and was planning a secondary share issue to fund a new factory. During the weeks leading up to the share issue, suspicious trading volumes surged by 400 percent, even though no new company news had been released. The share price plummeted from 10 pounds to 3 pounds.
An investigation by market regulators revealed that several offshore trading desks were engaging in naked short selling. They were selling blocks of Apex shares without borrowing them or arranging to borrow them. Because the trades could not settle, a massive pile of fails to deliver accumulated in the clearing system. This flood of phantom shares overwhelmed real demand.
Apex suffered severe financial damage. The depressed share price made their planned capital raise too dilutive, forcing them to cancel the factory expansion. Eventually, regulators imposed emergency buy-in rules, forcing the naked short sellers to purchase real shares in the market to settle their accounts. The share price rebounded partially, but the business lost months of momentum and thousands of pounds in legal fees.
Watch out
Common mistakes.
- Assuming normal short selling and naked short selling are legally the same thing.
- Believing that all settlement delays are automatically proof of malicious naked shorting.
- Thinking private companies can be targets of naked short selling on public exchanges.
Questions
People also ask.
Is naked short selling legal?
In most major financial markets, it is strictly illegal, though minor, accidental delays can happen during normal electronic clearing processes.
How does naked short selling affect a company's share price?
By introducing phantom shares into the market, it artificially increases supply, which can drive the share price down unfairly.
What is a fail to deliver?
It occurs when a seller fails to provide the actual shares to the buyer by the required settlement date, often resulting from naked shorting.
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