U.S. Stocks Up, Ford Boosts Gains  NEW YORK (Reuters) - U.S. blue chips advanced 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, while  wireless technology provider 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; checked  gains on Nasdaq after saying an accounting review may reduce  pretax income.