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admissible trading strategy : ウィキペディア英語版
admissible trading strategy
In finance, an admissible trading strategy or admissible strategy is any trading strategy with wealth almost surely bounded from below. In particular, an admissible trading strategy precludes unhedged short sales of any unbounded assets. A typical example of a trading strategy which is not ''admissible'' is the doubling strategy.
== Mathematical definition ==
In a market with d assets, a trading strategy x \in \mathbb^d is ''admissible'' if x^T \bar = x^T \frac is almost surely bounded from below. In the definition let S be the vector of prices, r be the risk-free rate (and therefore \bar is the discounted price).〔
In a model with more than one time then the wealth process associated with an admissible trading strategy must be uniformly bounded from below.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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