The US Securities and Exchanges Commission (SEC) has suspended trading in Cynk Technology after shares in the little-known social networking firm surged more than 23,000% in the past month.
Documents showed the firm - which is registered in Nevada with an office in Belize City, Belize - had no revenue and one employee.
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Shares in Cynk jumped from six cents in early June to $13.90 (£8.11) on Thursday, despite uncertainty about its business and revenue structure. That values places the firm at a valuation of close to $4bn - just slightly above the valuation of airline JetBlue.
Looks like someone’s "pump-n-dump" scheme went critical!