Ambac Seeks $1.5 Billion in Stock, Equity Unit Sales <a href="http://www.bloomberg.com/apps/news?pid=20601103&sid=aCinvOgvhVUQ&refer=us" target="_blank">http://www.bloomberg.com/apps/news?pid=20601103&sid=aCinvOgvhVUQ&refer=us</a>