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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 o ers
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...