eBay and Sotheby's have two things in common, and neither are enviable: each is a market underperformer over the last 12 months and both have been publicly harangued by activist investors. Their partnership means a small boost for Sotheby's, but eBay's stock continues its downward trend in the online bidding world, as options abound. At the same time, eBay's gem, PayPal, isn't getting the heat from Square it may have once feared -- Jack Dorsey's startup is developing slowly. With shares off 10% over the last 12 months, eBay is our Chart of the Day -- can its board turn it around?

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