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 λ = 0.93.