speculative stock
A stock actively traded by speculators, often subject to sharp price movements driven by market rumors or manipulation rather than fundamentals.
Speculative stocks can experience large price swings in a short period.
Compound of 仕手 (して, 'doer' or 'player', here referring to a speculator) and 株 (かぶ, 'stock'). The term likely originated in Japanese stock market jargon.