Circuit City Cuts Loss, Stock Soars  NEW YORK (Reuters) - Circuit City Stores Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=CC.N target=/stocks/quickinfo/fullquote"&gt;CC.N&lt;/A&gt; on  Friday reported a narrower quarterly loss as it kept a tight  rein on expenses and sales of digital televisions and notebook  computers rose, sending its stock up 5 percent.