All SEC suspended stocks can trade on the Grey Sheets after the ten day SEC Suspension expires. Often, though, it is the Brokers who won't let their clients buy previously suspended stocks and that is the main reason why there is so little trading activity on those stocks....plus, no-one wants to buy, knowing that a previously suspended stock will eventually have their ticker either deleted by FINRA (for unregistered stocks) or have their ticker and registration revoked by the SEC (for SEC reporting stocks).
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