Used in the context of general equities. (illegal) Purchasing a security or commodity in such volume that control over its price is achieved (e.g., Unhappy news for a short seller, who would have to pay an inflated price to cover).
CORNERING THE MARKET
Meaning of CORNERING THE MARKET in English
Campbell R. Harvey. Hypertextual finance English glossary. Английский словарь гипертекстовых финансов. 2012