Bulletin – September Quarter 2016 Equation (2)

β i = COV( r i , r m ) var( r m ) =( ρ r i , r m )( σ r i σ r m ) MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=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@5C74@