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The article presents a translation of some widespread financial terminology into the language of decision theory. For instance, financial leverage can be regarded as an object of choice or a decision....
Optimal leverage from non-ergodicity
Portfolio selection ergodicity leverage log-utility Kelly criterion
2010/10/29
In modern portfolio theory, the balancing of expected returns on investments against uncer-
tainties in those returns is aided by the use of utility functions. The Kelly criterion oers
another appr...
Leverage Causes Fat Tails and Clustered Volatility
systemic risk clustered volatility fat tails crash margin calls leverage
2010/11/2
We build a simple model of leveraged asset purchases with margin calls.Investment funds use what is perhaps the most basic nancial strategy,called \value investing", i.e. systematically attempting to...