50 commonly used options terms and their English-Chinese translations with brief explanations:

• Option

• A contract that gives the buyer the right, but not the obligation, to buy or sell an asset at a specified price within a specified time.

• Call Option

• Grants the holder the right to purchase the underlying asset at the strike price before expiration.

• Put Option

• Grants the holder the right to sell the underlying asset at the strike price before expiration.

• Exercise Price/Strike Price

• The price of the underlying asset specified in the option contract.

• Expiration Date

• The last date on which the option contract expires.

• Intrinsic Value

• The difference between the exercise price of an option and the market price of the underlying asset.

• Time Value

• The portion of the option price that exceeds its intrinsic value, reflecting the potential for price movement of the underlying asset before expiration.

• Implied Volatility

• The market's expected volatility of the underlying asset, inferred from option prices.

• Expected Volatility

• Prediction of future volatility of the underlying asset based on historical data and market sentiment.

• Volatility

• An indicator measuring the magnitude of price movements of the underlying asset.

• Covered Call

• Selling call options while holding the underlying asset.

• Naked Short Selling

• Selling put options on the underlying asset without holding or borrowing it.

• Risk-Free Interest Rate

• Yield on investments theoretically without default risk (e.g., government bonds).

• Cash Settlement

• Cash settlement of the price difference at the expiration of the options, without physical delivery of the underlying asset.

• Position Limit

• Restrictions on the number of positions held by the investor.

• Strike Price Interval

• The difference between two adjacent strike prices of option contracts based on the same underlying asset.

• Breakeven Point

• The price of the underlying security when the investor's returns from the options investment are zero.

• Limited Loss

• The maximum loss for the option buyer is limited to the premium paid.

• Conversion Arbitrage

• A risk-free arbitrage strategy involving the purchase of the underlying asset, buying put options, and selling call options.

• Vertical Spread

• Buying one option while selling another option with the same underlying asset and expiration date but different strike prices.

• Ratio Spread

• Buying a certain number of options while selling more options with the same underlying asset and expiration date but different strike prices.

• Strap

• Buying two call options while buying one put option with the same strike price and expiration date.

• Butterfly Spread

• A composite arbitrage strategy that includes both long and short butterfly spread strategies.

• Long Butterfly Spread

• Buying one call option at a lower strike price and one call option at a higher strike price while selling two call options with strike prices between the two.

• Box Spread

• A strategy that combines bull spread and bear spread strategies.

• Short Butterfly Spread

• Selling one call option at a lower strike price and one call option at a higher strike price while buying two call options with strike prices between the two.

• Calendar Spread

• Selling a call option with an earlier expiration date while buying a call option with the same strike price but a later expiration date.

• Straddle

• Buying one call option while simultaneously buying one put option with the same strike price and expiration date.

• Strangle

• Buying one call option while also buying one put option with the same expiration date but different strike prices.

• Bull Spread

• Buying one option while simultaneously selling another option on the same underlying asset with the same expiration date but a higher strike price.

• Bull Call Spread

• Buying a call option at a lower strike price while selling one call option at a higher strike price on the same underlying asset with the same expiration date.

• Bull Put Spread

• Buying a put option at a lower strike price while selling a put option at a higher strike price on the same underlying asset with the same expiration date.

• Bear Spread

• Buying one option while simultaneously selling another option on the same underlying asset with the same expiration date but a lower strike price.

• Bear Call Spread

• Buying a call option at a higher strike price while selling a call option at a lower strike price on the same underlying asset with the same expiration date.

• Bear Put Spread

• Buying a put option at a higher strike price while selling a put option at a lower strike price on the same underlying asset with the same expiration date.

• Strip

• Buying one call option while buying two put options with the same strike price and expiration date.

• Condor

• Selling (buying) two options at different strike prices while simultaneously buying (selling) options at lower and higher strike prices.

• Maintenance Margin

• Funds secured in the margin account to ensure contract performance.

• Naked Option

• Short position in options where the seller does not hold the underlying contract.

• Cash or Physical Settlement

• The method of settlement at the expiration of options, which can be cash payment of the price difference or physical delivery.

• Limit Order

• Orders executed at the specified price or better.

• Market Order

• An order executed immediately at the current market price.

• Stop Order

• Orders executed when the market price reaches a specified level.

• Market If Touched Order (MIT)

• Orders that become market orders when market prices reach specified levels.

• Good-till-Cancelled Order

• Orders that remain valid until executed.

• Spread Order

• Orders to simultaneously buy and sell two related contracts.

• Cancel Order

• Instruction to cancel unexecuted orders.

• Settlement Price

• The official price used for option settlement.

• Physical Delivery

• Physical delivery of assets at the expiration of the options.

• Hedging

• The practice of reducing the risk of price changes in the underlying asset by buying and selling options.