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Portfolio Theory

2007
Abstract A portfolio is a collection of securities. Portfolio theory is a formal analysis of the relationship between the rates of return on a portfolio of risky securities and the rates of return on the securities contained in that portfolio. The rate of return on a portfolio is a random variable.
Janette Rutterford, Marcus Davison
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Conic Portfolio Theory

SSRN Electronic Journal, 2015
Portfolios are designed to maximize a conservative market value or bid price for the portfolio. Theoretically this bid price is modeled as reflecting a convex cone of acceptable risks supporting an arbitrage free equilibrium of a two price economy.
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Digital Portfolio Theory

Computational Economics, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Instantaneous portfolio theory

Quantitative Finance, 2016
Instantaneous risk is described by the arrival rate of jumps in log price relatives. As a consequence there is then no concept of a mean return compensating risk exposures, as zero is the only inst...
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