Short selling may look like simply reversing a normal stock trade, but the risk is very different. You short 10 shares at $100, effectively selling for $1,000. When the stock rises to $130, you must spend $1,300 to buy those 10 shares back, locking in a $300 loss, before borrow interest, fees, or dividend compensation.
The more important lesson is that short sellers face an asymmetric risk. A stock can theoretically rise without limit, meaning losses can continue to grow. Meanwhile, borrow availability can change, margin requirements can increase, and a sudden rally may trigger forced buying or even a short squeeze.
GameStop was a powerful reminder: being right about a company eventually falling doesn't guarantee you survive the journey.
So before shorting, I think the better question is not “How much can it fall?”, but “How much can I afford to lose if I'm wrong?”
@Tiger_AU [思考]
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