Today, as part of our ongoing series looking at reasons to buy and sell certain stocks, Brenton focuses on the bear case against glass maker Corning. Though the stock looks incredibly cheap by most valuation metrics, some would argue that there are some serious secular headwinds that will continue to weigh on revenue growth. In particular, the company's core business has been struggling, and burgeoning opportunities in specialty glass products might not be enough to offset those declines. In the following video, Brenton outlines a few points for investors to consider with Corning. Later, he'll follow up with his personal view on whether Corning is a buy, sell, or hold.

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