A naked put, also known as an uncovered put, is an options trading strategy where an investor sells a put option without owning the underlying asset. This means that the investor has an obligation to buy the underlying asset at a predetermined price, known as the strike price, if the option is exercised by the buyer.

When selling a naked put, the investor receives a premium from the buyer, which is the price of the option. If the price of the underlying asset remains above the strike price, the option will expire worthless and the investor will keep the premium as profit. However, if the price of the underlying asset falls below the strike price, the investor will be obligated to buy the asset at the strike price, even if the market price is lower.

Naked puts are considered a risky trading strategy because of the unlimited downside risk. If the price of the underlying asset drops significantly, the investor could potentially incur a substantial loss. Therefore, naked puts are generally used by experienced traders who are willing to take on this risk in exchange for potentially higher profits.

It is important to note that selling naked puts requires approval from a brokerage firm and is typically only allowed for traders with a certain level of options trading experience and financial resources.