“In 2013 we saw the revival of classic stock pump-and-dump spam… Pump-and-dump messages promise that a penny stock is about to jump in price. When a few victims buy into the hoax, the senders sell and capture all the profits. Several years ago, pump-and-dump spam accounted for over 50% of all spam on some days, but after a U.S. Securities and Exchange Commission crackdown, it nearly disappeared…” – Sophos Security Threat Report 2014
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