Good question. NASDAQ could have already delisted the stock a long time ago, which was SOP in many other past cases of SEC suspension and suspected fraud. But, in this case, they haven't. By keeping them listed, but suspended, it prevents Tingo from trading anywhere. That may be the SEC and NASDAQ's new tactic in these cases. Since the alleged mastermind of the fraud controls most of the stock, and has been secretly pumping and dumping for years, they probably want to deny him any opportunity to continue to sell shares.
Tingo, assuming they have any actual management or directors left, could apply to voluntarily delist from NASDAQ, but that hasn't happened, either. Even if they do that and go OTC, they would just be expert market.
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