Informational Rescaling of PCA Maps with Application to Genetics

Nassim Nicholas Taleb∗, Pierre Zalloua, and Dan Platt
∗Corresponding author, [email protected] Dec 2019

We discuss the inadequacy of covariances/correlations and other measures in L-2 as relative distance metrics. We propose a computationally simple heuristic to transform a map based on standard principal component analysis (PCA) (when the variables are asymptotically Gaussian) into an entropy-based map where distances are based on mutual information.

PDF Download Link: academia.edu/41442347/Informational…

[YouTube] On Warnings over Systemic Risks from Global Pandemics

Nassim Taleb, Universa Investment’s scientific advisor and distinguished professor of risk engineering at NYU, warned of an acute virus spreading throughout the planet in his 2007 book “The Black Swan.” In January, he also warned of the systemic risks of the coronavirus pandemic. He joins “Squawk Box” to discuss.

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[YouTube] Tutorial: Simple Trick to see the effect of Power Laws

A simple tutorial explaining how in the presence of power laws (with low exponent) most of the body of the distribution becomes noise. Once you establish that a variable is in the power-law class, some necessary consequences come out. To debunk that history is dominated by tail events, you must show it does not follow a power law.

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The only man who has a clue about the Coronavirus Pandemic

Link to original article – Taleb: The Only Man Who Has A Clue

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Bloomberg: Nassim-Advised Universa Tail Fund Returned 3,600% in March

A tail-risk hedge fund advised by Nassim Taleb, author of “The Black Swan,” returned 3,612% in March, paying off massively for clients who invested in it as protection against a plunge in stock prices

The fund, managed by Universa Investments of Miami, had a year-to-date return of 4,144% through the end of last month, according to an investor letter from President and Chief Investment Officer Mark Spitznagel that was obtained by Bloomberg. He said Universa was able to cash in many of its positions, locking in the gains, while also keeping in place protection against more equity sell-offs, “one of the tricks of the trade.”.

Link to Bloomberg article: Nassim Taleb-Advised Universa Tail Fund Returned 3,600% in March

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Bloomberg: Portfolios to ‘Blow Up’ Without Tail Hedges

“The worst thing you can do with insurance is try to time it,” Taleb, a distinguished professor of risk engineering at New York University, said in an interview Monday on Bloomberg Television. “If you don’t have tail insurance, you don’t have a portfolio. Your portfolio is going to blow up.”

That’s a sobering reality check from someone who has long argued that instead of turning to the government for help in times of crisis, big investors and corporations should manage their own risks. His pleas for prudence were largely ignored, though, and most parts of the economy were ill-prepared for a sudden downturn when the coronavirus hit.

Link to Bloomberg article: Taleb Says Portfolios to ‘Blow Up’ Without Tail Hedges

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The book Statistical Consequences of Fat Tails: Real World Preasymptotics, Epistemology, and Applications is finally on Amazon

Cover of Nassim's book

The book Statistical Consequences of Fat Tails: Real World Preasymptotics, Epistemology, and Applications is finally on Amazon. Click Here.

PDF freely available here – Nassim Nicholas Taleb (2020). Statistical Consequences of Fat Tails: Real World Preasymptotics, Epistemology, and Applications. RESEARCHERS.ONE, https://www.researchers.one/article/2020-01-21.