an option you can sell at any time before the expiry of the position. This is the most common form of stock options. Ask Price

a commodity, index, stock, or currency pair, which is the basis of the binary option. Asset Class

when the price at the time of expiry is the same as the price at the opening of the position, and the trader is fully reimbursed with the invested funds.

a trader who predicts that the the price of an asset will drop. Bear Spread

the price of the underlying asset when it is sold. Binary Options

a certificate issued by a large company or a state as a promissory note. Breakeven Price

a trader who predicts that the price of an asset will rise. Bull Spread

a strategy is binary options trading combines bear and bull spreads.

an option whose expiry price is higher than the purchase price, and the forecast does exactly this scenario. Correlation

 the price of an asset at that moment.  CDO (Collateralized Debt Obligations)