Dan S. Ahrens, 39, the omnipresent manager of the successful $48 million Vice Fund, which invests in so-called "sin stocks" has abruptly bolted from his job as sole portfolio manager, and president and treasurer, of the fund's Dallas-based investment adviser, Mutual Advisors. He has also been managing a second, smaller fund for the firm.

Although details of his departure were not provided, sources pointed to disagreements with the adviser, and Ahrens being put in a situation where he no longer felt comfortable.

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