Paper: Home Depot Shares Look Undervalued  NEW YORK (Reuters) - Shares of Home Depot Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=HD.N target=/stocks/quickinfo/fullquote"&gt;HD.N&lt;/A&gt;, the  largest U.S. home improvement retailer, may extend gains amid  solid expected growth in sales of homes and home improvement  products, according to the latest edition of Barron's, the  weekly financial newspaper.