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Suppose that the level of the S&P 5 0 0 index at close of trading yesterday was $ 2 , 9 0 0 and its

Suppose that the level of the S&P 500 index at close of trading yesterday was $2,900 and its volatility was estimated as 1.2% per day. The price at the close of trading today is $2,800. Update the daily volatility estimate using:
i. The EWMA model with \lambda =0.94.
ii. The GARCH (1,1) model with \omega =0.000002,\alpha =0.05 and \beta =0.94.

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