Article Contents
Article Contents

# Information uncertainty related to marked random times and optimal investment

The authors are grateful to the anonymous referees for their careful reading and their many insightful comments and suggestions.
• We study an optimal investment problem under default risk where related information such as loss or recovery at default is considered as an exogenous random mark added at default time. Two types of agents who have different levels of information are considered. We first make precise the insider's information flow by using the theory of enlargement of filtrations and then obtain explicit logarithmic utility maximization results to compare optimal wealth for the insider and the ordinary agent.
Mathematics Subject Classification: 60G20;91G40;93E20.

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