Lowe's Reports 18 Pct. Hike in Profits  ATLANTA (Reuters) - Lowe's Cos. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=LOW.N target=/stocks/quickinfo/fullquote"&gt;LOW.N&lt;/A&gt;, the world's No. 2  home improvement retailer, on Monday reported an 18 percent  increase in second-quarter profit and said earnings for the  rest of the year would top current estimates.