BHP BILLITON LTD. ADRs $63 (New York symbol BHP; Conservative Growth Portfolio, Resources sector; ADRs outstanding: 2.8 billion; Market cap: $176.4 billion; Price-to-sales ratio: 3.5; WSSF Rating: Average) is the world’s largest mining company, with major operations in Australia, South Africa, Chile and the U.K. It produces iron ore, coal, oil, aluminum, manganese, diamonds and titanium. In its latest fiscal year, which ended June 30, 2009, BHP’s revenue fell 15.6%, to $50.2 billion from $59.5 billion a year earlier. Lower resource prices were the main reason for the drop. Earnings before unusual items fell 30.2%, to $10.7 billion from $15.4 billion. Earnings per ADR fell 29.9%, to $3.85 from $5.50. (Each American Depositary Receipt represents two BHP common shares.) The stock has jumped by 70% since we first recommended it at $37 in our March 2009 issue. The gain was partly caused by BHP’s new agreement to merge its iron-ore mining operations in Western Australia with those of Rio Tinto Ltd. (New York symbol RTP) to form a new 50/50 joint venture. The deal should close in 2010, and save BHP $5 billion a year. The company will probably earn $3.30 per ADR in fiscal 2010, and the stock trades at 19.1 times that estimate. The $1.64 dividend yields 2.6%. BHP Billiton is a buy.