source: http://www.telegraph.co.uk/finance/markets/marketreport/6203429/Rumours-that-Xstrata-is-to-walk-away-from-Anglo-American.html
A couple of interesting quotes in the above article (see below):
So Mr LaFemina, who downgraded Anglo to "equalweight", concluded that he does "not expect an Xstrata/Anglo merger to happen at this time".
Lonmin was also sold off as the Xstrata takeover rumours continued to be played down by brokers, such as Cazenove, which happens to advise the mining giant on mergers and acquisitions. Lonmin shares retreated 48p to £17.83