The closing price of stock A was $150 yesterday and today its volatility was estimated as 2%
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Question:
The closing price of stock A was $150 yesterday and today its volatility was estimated as 2% per day. The closing price of stock B yesterday was $25, and its volatility today was estimated as 1.5% per day. The correlation between A and B was estimated today as 0.6. At the close of trading today the price of A is $155, and the price of B is $24.
Update for tomorrow the volatility of A and B and the correlation between A and B using the EWMA model with l = 0.93.
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