Nassim Nicholas Taleb @nntaleb
Adding to book: Foundation of Risk Parity is, officially: 1) finite and KNOWN variance 2) ellipticality. Problem: variance is not projectable since kurtosis is patently infinite. No ellipticallity since infinite higher order moments. Also problem of preasymptotic behavior. https://t.co/OyDY4YPh6B — PolitiTweet.org