Stock represents ownership in a company. Shareholders may earn through price appreciation and dividends.
Last letter: K
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Kappa衡量隐含波动率1%变化时期权价格的变化。高Kappa意味着期权价格对波动率变化非常敏感；低Kappa表明影响有限。它帮助交易者估计由于市场波动变化而导致的看涨期权和看跌期权费的变化。
上次alphabet：一个