美式期权与欧式期权 American vs European Options 美式期权-期权可以在到期日及到期日之前任 何时候执行 American- the option can be exercised at any time before expiration or maturity 欧式期权-期权只可以在到期日执行 European-the option can only be exercised on the expiration or maturity date 20620-6 美式期权与欧式期权 American vs European Options 美式期权 -期权可以在到期日及到期日之前任 何时候执行 American - the option can be exercised at any time before expiration or maturity 欧式期权 -期权只可以在到期日执行 European - the option can only be exercised on the expiration or maturity date