U.S. Stocks End Up, Ford Gives a Lift  NEW YORK (Reuters) - Stocks rose on  Friday after Ford  Motor Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=F.N target=/stocks/quickinfo/fullquote"&gt;F.N&lt;/A&gt; raised its earnings forecasts, but Qualcomm  Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=QCOM.O target=/stocks/quickinfo/fullquote"&gt;QCOM.O&lt;/A&gt; limited advances on the Nasdaq after the wireless  technology provider said an accounting review may reduce its  pretax income and revenue.