According to the Ibbotson SBBI 2011 Yearbook, long-term Treasuries have a correlation coefficient of 0.11 to large-cap stocks.

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The post-crisis correlation coefficient, meanwhile, was a much weaker -0.431.

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However, intermediate-term Treasuries have a correlation coefficient of 0.08.

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To make more sense of this, the International Tennis Federation, the game's law-makers, have produced a chart which simply matches the coefficient of friction (friction) and coefficient of restitution (bounce) to produce a court pace rating.

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The virality of a messaging platform equals its emotion-friction ratio, and the Snapchat paradigm maximizes this virality coefficient.

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