Dreyfus, the New York-based mutual fund company, has found itself tangled in a brouhaha over journalistic ethics because one of its radio spots has been read on the air by a well-known financial journalist.

Lou Dobbs, the host of "Lou Dobbs Moneyline" on CNN, has been lending his voice to commercials for Dreyfus, according to a spokeswoman at the company. Meanwhile, Dreyfus is one of the advertisers on "Lou Dobbs Moneyline."

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