The biggest global mining companies are expected to post strong results, starting this week, but could also usher in the end of the past-month's bull run as attention turns to a future in which cost cutting gives way to inflation.

"Miners have no cost levers left," said Goldman Sachs analysts in a noted published Monday. "In fact, costs are rising and so too is capex."

There could still be some pleasant surprises in store; Anglo American plc (AAUKF) , which reports on July 27, Rio Tinto Group (RIO) , Aug. 2, and BHP Billiton plc (BHP) , Aug. 22, will all be watched closely for their dividends, with investors hoping that average sector free cash flow of about 7% will translate into improved payouts.

Anglo American could provide the biggest surprise if it reinstates its dividend for the first half, rather than waiting until the end of the year as analyst expect. If the dividend does drop this week, Goldman suggests it could come in at about $0.22, providing a likely boost to the stock. Analysts consensus on Anglo is for underlying EBITDA of $4.1 billion for the first half.

Rio Tinto's first half results will be notable largely for its dividend statement, which could top the scale at about $0.90, twice as much as the same period last year. The announcement of further share buybacks could also provide a boost to shares.

BHP will report its 2017 financial year earnings on Aug. 22, but with its production figures already released there should be little surprise. The real interest will be on its oil and potash plans, with the company under pressure from activist Elliott Advisors to offload the former and pull plans to invest in the latter.

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