Hopium In securities trading a trader is said to be under the influence of the fictional narcotic hopium when she/he finds themselves deeply in the negative on the wrong side of a trade. The trader will continue to hold the position in the hopes that the security will return to the value at which they acquired it. (eg. staying long in a stock position when the price continues to plummet) Source: http://www.urbandictionary.com/define.php?term=hopium You see the term "hopium" used quite frequently on CNBC. It is similar to the phrase "drinking the Kool-Aid."