No. Short selling of crypto-assets is not supported.
All exchange and custody services in connection with trading and holding crypto-assets through IBKR trading platforms are provided by zerohash europe B.V.
Can I short sell crypto-assets?
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Are cryptocurrency positions marginable?
Can I short-sell cryptocurrencies?
What trading platforms can I use for crypto-asset trading?
How much does it cost to trade crypto-assets through IBIE?