It's probably not the kind of Weight Watchers loss Oprah was hoping for.
Bloomberg reports the media mogul and former talk show host lost more than $39 million -- on paper -- after Weight Watchers forecast its 2019 profit will fall far short of Wall Street estimates.
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Winfrey owns more than 8 percent of Weight Watchers, making her the company's biggest individual shareholder.
Bloomberg says Weight Watchers stock fell 23 percent in extended trading at 5 p.m. Tuesday.
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But don't look for Oprah to be too crushed by Tuesday's losses. According to the Bloomberg Billionaires index, the 65-year-old Winfrey is still worth $3.4 billion, with most of her net worth held in cash.