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Short
Basics
どういう意味か
Betting that an asset will fall in price. You borrow the asset, sell it now, and aim to buy it back cheaper later to return it.
例
You short 50 shares of TSLA at $250. If it drops to $230, you buy back for $11,500 instead of the $12,500 you received, pocketing $1,000.
初心者がよくやるミス
Beginners forget the loss on a short has no fixed ceiling -- if TSLA runs to $500 you owe far more than you started with. Shorting is not just "long in reverse."