noun
option trading; option dealing; option transaction
Financial term for buying and selling options contracts.
オプション取引はリスクが高い。
Option trading is high-risk.
彼はオプション取引で大きな利益を得た。
He made a large profit through option trading.
先物取引 (futures trading) involves an obligation to buy or sell, while オプション取引 gives the right but not the obligation.
Compound of オプション (from English 'option') and 取引 (trading).