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You buy a European put option on a non-dividend paying stock for $2. Immediately afterwards, the call option price falls to $1.50, but the stock
You buy a European put option on a non-dividend paying stock for $2. Immediately afterwards, the call option price falls to $1.50, but the stock price and risk-free rate did not change. What must have happened to the option's implied volatility? Decreased. Increased. Did not change. Need more information
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