Wells Fargo blames yesterday's decline in Constellation Brands' stock on comments by President Trump about a border adjustment tax and its CFO's warning that depletions for fiscal 2017 would fall slightly below the midpoint of the prior 10-12% range,due to weak December results. However, Wells Fargo says that there are many ways that Constellation Brands can offset the impact of a border tax, and it believes that the market is overestimating the impact that such a tax would have on the company's results. The firm adds that the CFO said that the company's results have improved in January and February. Wells says that the stock is "signfciantly undervalued," and recommends buying the stock on weakness.