At the end of Thursday, the estimated covariance between assets A and B is 0.0001 . During Friday asset A produces a return of 3% and asset B produces a return of zero. An EWMA model with lambda equal to 0.9 is used
What is an estimate of the covariance at the end of Friday?
A. 0.000090
B. 0.000081
C. 0.000100
D. 0.000095
A
The covariance is 0.9×0.0001+0.1×0.03×0 = 0.000090 .
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