Garbatrage

What Does Garbatrage Mean?
An increase in price and trading volume in a particular sector of the economy that occurs as a result of a recent takeover, which initiates a change in sentiment toward the sector. 

Garbatrage is also known as "rumortrage".

Investopedia explains Garbatrage
Garbatrage is usually used to refer to firms that are not directly related to the takeover. Speculators feel that the initial takeover is a precursor to more takeovers within the sector. Proponents of behavioral finance theory would view this psychological impact as evidence that supports their theory.