>>49719810Imagine you are shorting a stock and let's use the term "card" for a share.
Right now this one yugioh card is worth 100$, and you predict its price will go down.
The first step is you borrow someone's card for a period of time, say 1 week, and you sell that card, you get 100$. 3 days later your prediction comes true and the card price goes down to 90$, you buy that card again, and now you have 10$ left from that transaction.
You return that card to the original owner plus the borrowing cost, how much the cost depends on the owner, let's say it's 2$. You get 8$ out of this.
Now what if instead of going down, the price goes up to 110$ instead? You buy the card at a loss, plus the borrowing cost. This is why shorting is basically gambling.