On the quadratic variation of the model-free price paths with jumps

Lesiba Ch. Galane, Rafa{\l} M. {\L}ochowski and Farai J. Mhlanga

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Abstract: We prove that the model-free typical (in the sense of Vovk) c\`adl\`ag price paths with mildly restricted downward jumps possess quadratic variation which does not depend on the specific sequence of partitions as long as these partitions are obtained from stopping times such that the oscillations of a path on the consecutive (half-open on the right) intervals of these partitions tend (in a specified sense) to 0. Finally, we also define quasi-explicit, partition independent quantities which tend to this quadratic variation.

Date: 2017-10, Revised 2018-05
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