Coca-Cola: Second Half to Lag Street View  CHICAGO (Reuters) - Coca-Cola Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KO.N target=/stocks/quickinfo/fullquote"&gt;KO.N&lt;/A&gt; on Wednesday said  earnings for the rest of 2004 would lag current Wall Street  expectations because of weakness in key markets, further  highlighting the divergent fortunes of the world's largest soft  drink maker and its top rival, PepsiCo Inc.