This can help explain the sp action.
Leighton Holdings Ltd., Australia’s biggest construction company, jumped 10 percent to A$36.63, the biggest advance on the MSCI Asia Pacific Index today. The company, which forecast on Aug. 14 a rebound in profit, was upgraded to “buy” from “underperform” at Merrill Lynch & Co. and to “outperform” from “neutral” at Macquarie Group Ltd.
http://www.bloomberg.com/apps/news?pid=newsarchive&sid=asTnsRkUT1d0