FORESTALLER
Etymology
Noun
forestaller (plural forestallers)
A person who forestalls, especially one who buys goods before they can be sold on the open market in anticipation of rising prices
Usage notes
For at least a period of time in the late-18th century, under English Royal law, forestaller had a more narrow meaning which included the concept of not selling again in the same market within three months. By this de jure restriction, legislation attempted to distinguish between a socially useful function (storing grain for a potential future dearth) and an alleged socially harmful function of buying up grain so as to increase the price to the poor or needy by facilitating a so-called excess profit to the intermediary.
Source: Wiktionary
Fore*stall"er, n.
Definition: One who forestalls; esp., one who forestalls the market. Locke.
Source: Webster’s Unabridged Dictionary 1913 Edition