Bulletin – December Quarter 2017 Equation

min w i ¯ t T i=1 8 ( w i ¯ π i,t π t ) 2 ,subjecttotheconstraints i=1 8 w i ¯ =1 and w i ¯ 0. MathType@MTEF@5@5@+=feaagCart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=xfr=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@8194@