Here's the quote in question: Due to the extreme volatility of cryptocurrencies, clients will be unable to assume a short position. In addition, only limit ord

Here's the quote in question: Due to the extreme volatility of cryptocurrencies, clients will be unable to assume a short position. In addition, only limit orders will be accepted. IBKR’s margin requirement on long positions will be at least 50%. The company will continue to monitor concerns surrounding the market's ability to process bitcoin futures risk.