What it is

Short selling, also called shorting, is when you sell a stock that you do not own in your portfolio, expecting the price to fall so you can buy it back later at a lower value. In simple terms, you bet on the stock’s decline. If everything goes as expected, the difference between the sale price and the repurchase price becomes profit. If the price rises, you will have to buy the stock at a higher price and incur a loss. This strategy is usually used by investors who already have some market experience and understand the risks involved.

What it is

How it works

The operation occurs in three basic steps:

  • Loan: you borrow the stocks from a broker or another investor.
  • Sale: you sell the stocks in the spot market at the current price.
  • Buy‑back: when (or if) the price falls, you buy the same stocks at a lower price and return them to the lender, keeping the difference.

All this process takes place within the same broker, which handles the loan and the collection of interest on the use of the stocks. The investor pays a borrowing fee (usually an annual percentage) and, if the price rises, may be required to cover the position at any time, which means buying immediately at market price.

Advantages

  • Potential profit in down markets: while most investors only make money when the price rises, short selling allows you to profit when everything falls.
  • Diversification of strategies: adds another tool to your arsenal, helping to balance the portfolio across different economic cycles.
  • Protection (hedge): can be used to protect long (bought) investments against unexpected drops, reducing overall risk.

Advantages

Risks

  • Unlimited loss: unlike a traditional purchase, where the maximum loss is the amount invested, in short selling the loss can be infinite because the stock price can rise without limit.
  • Margin call: if the price rises sharply, the broker may require you to deposit more money (margin) or close the position immediately, generating a loss.
  • Borrowing costs: in addition to the brokerage fee, you pay interest on the loan of the stocks, which can erode profit, especially if the trade lasts a long time.

Practical examples

Imagine you earn $1,000 per month and have $4,000 available to invest. You believe that the shares of company X, priced at $10, will fall in the coming months.

  1. Loan and sale: you borrow 200 shares (200 × $10 = $2,000) and sell them immediately, receiving $2,000.
  2. Price drop: two weeks later, the stock falls to $8. You buy 200 shares (200 × $8 = $1,600) and return them to the lender.
  3. Gross profit: $2,000 – $1,600 = $400. From this amount, subtract the borrowing fee (let’s say 2% per year, proportional to the period) and the brokerage fee, and you still have a net gain of about $380.

Now, see the opposite scenario: the stock rises to $14. You need to buy the 200 shares for $2,800, resulting in a loss of $800 before costs. This example shows how leverage can turn a small price movement into a significant gain or loss.

Practical tip: never use more than 10 % of your total capital in a single short‑selling trade; this helps limit the impact of an unexpected rise.

Practical tip: keep an emergency reserve (at least 3 to 6 months of salary) outside your investment account; that way, if you need to cover a margin call, you won’t have to sell assets in desperation.

Practical tip: monitor the