Shares of BHP Group touched a three-month high on Tuesday about 36 hours ahead of a deadline to lodge a formal bid for rival miner Anglo American, which last week rejected a sweetened $43 billion takeover proposal.

The world’s largest listed miner’s shares are benefiting from good news including fresh stimulus for China’s property sector, copper prices reaching record highs and a growing view that BHP will not make another tilt at Anglo, according to Andy Forster, senior investment officer at Argo Investments, a BHP shareholder.

“We saw last week that they had a bit of a bounce after rejection by Anglo,” he said. “I think they’re going to stay disciplined. I’d be surprised if they’d come back at this late stage given the lukewarm response from Anglo’s board to the previous offers.”

Under UK takeover rules, BHP has until 1600 GMT on Wednesday to make a binding bid for Anglo American or it will be forced to walk away for at least six months. If the companies reach an agreement in the meantime, an extension can be granted.

BHP declined to comment on Tuesday. Its shares were up 0.5% to A$45.93 in afternoon trading. Anglo’s London-listed shares closed 0.1% higher at 26.80 pounds on Monday.