GE OKs \$15 Bln Buybacks, Hikes Dividend  BOSTON (Reuters) - Diversified manufacturer General  Electric Co. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GE.N target=/stocks/quickinfo/fullquote"&gt;GE.N&lt;/A&gt; on Friday said it boosted its quarterly  dividend by 10 percent and earmarked up to \$15 billion for  share repurchases over the next three years.