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Washington is effectively laying down a set of conditions before it would consider delisting the group - a critical step which could help ease the path towards sanctions relief that Damascus desperately needs.

Some 88 companies have delisted or transferred their primary listing from London's main marker, with only 18 taking their place.

Yet Bakkt has never turned a quarterly profit, and this year faced delisting.

Its share price has plummeted and this week it narrowly avoided being delisted from the stock market.

The company also received a delisting notice from the New York Stock Exchange, it announced Monday, because the average closing price of shares was less than $1 over a consecutive 30 trading-day period.